Android Puzzle Games

• Word Games
• Adventure Games and Room Escape Games
• Christmas Apps

2048 Number puzzle game by Estoty Entertainment Lab (free) - Slide the numbered tiles so that any tiles with the same number in them will touch and combine their values. In other words, when two "2" tiles touch, they'll combine into a single "4" tile. Combine two "4" tiles to make an "8" tile, and so on. The goal is to create a "2048" tile. When you swipe your finger to the left or right or up or down, then all of the tiles will move in that direction (if possible).

3qual Game (Free set) by Pascalcula (free) - A puzzle based on the Set card game. Twelve cards are displayed, each of which has a certain combination of properties: color, shape, shading, and number (i.e. number of shapes). You must tap a set of three cards which have the following conditions: For each property (color, shape, shading, and number), all three cards must match in that property or all three cards must not match in that property. In other words, if two cards match in a property but the third card does not match in that property then it's not a set.

AlphaMetic by eximietate, inc. (free) - Solve challenging math puzzles in which the numbers are replaced by letters (e.g. "SEND + MORE = MONEY"). Tap a letter in the math problem, then tap a number below the math problem to replace the letter with the number.

Amazing Alex Free by Rovio Mobile Ltd. (free) - Create contraptions to solve physics-based puzzles, such as placing a wooden stool into the proper position so that a ball can roll into a basket.

Battleship Solitaire Puzzles by Frozax Games (free) - A nice version of Battleship Puzzle or Bimaru or Battleship Solitaire, which is better than the other versions I've tried. The object is to use the clues to place the ships into the correct positions on the game grid. Every ship is completely surrounded by water (imagine that the game grid is surrounded by water as well). Also see Ship Attack: Sudoku for Ships (below).

BLOCK x 3 by Noodlecake Studios Inc (free) - Drag colorful square blocks to make at least three in a row, causing those blocks to disappear. The object is to clear the board in as few moves as possible. The number in the top left corner of the screen tells you how many moves you have left (if you use too many moves then you lose the game). When there are two blocks of different colors next to each other, you can drag one onto the other to swap their positions.

Cat Physics by Donut Games (free) - One cat has a ball curled up in its tail, and the object is to get the ball to the other cat in the shortest amount of time possible. To play, tap the cat which has the ball (tap the cat again to cancel your throw). Before you throw the ball, there are one or more "arrow" icons which you must drag to the best positions in order for the ball to reach the target cat. When the ball touches an arrow, it will be thrown in the direction that the arrow is pointing. It's usually not too difficult to get the ball to the target cat, but it's quite a challenge to get the ball to the cat fast enough to qualify for three stars.

Chess Light by Pyrosphere (free) - Several chess pieces are displayed, and you must drag them onto the game board so that all of the highlighted squares on the board are under attack (including the squares containing the chess pieces).

Cogs Demo by Lazy 8 Studios (free) - This is a nice Steampunk puzzle. Tap "Inventor Mode," then tap the name of a puzzle in the window on the left side of the screen and read the goal of the puzzle in the window on the right side of the screen. Tap the "Play" button at the bottom left side of the screen, then solve the puzzle by sliding the tiles around.

Color Drips by LabPixies (free) - If two or more blocks of the same color are touching each other (horizontally or vertically) then tap them to remove them from the board. The goal is to remove all of the blocks.

Color Zen by Large Animal Games (free) - The goal on each level is to fill the screen with the color which borders the screen. To do this, slide one of the pulsing shapes until it hits another shape that has the same border color as the shape which you slid. When the same colors touch, then the whole screen is filled with that color. Make sure that the last color to flood the screen is the same color as the border around the screen. Also see Flood-It! (below).

Connect'Em by Magma Mobile (free) - Connect all of the blobs by dragging the arms between them (each arm can make one or more connections between blobs). Every blob has a number, indicating how many connections it needs to make.

CrossMe Color Nonograms by Mobile Dynamix (free) - A Nonogram, or Hanjie, or Paint by Numbers, or Griddler, etc. type of puzzle, which makes colorful pictures. At the bottom of the screen, tap a colored square to highlight it by making it larger than the other square(s). Tapping an empty cell in the game board will fill the cell with the highlighted color. Tapping a cell which contains the highlighted color will change the cell to an "X" (to remind yourself that the cell needs to be empty). Tapping an "X" will make the cell empty. Long-pressing a cell will cause a circle to be drawn around the cell, then you can drag your finger to fill in several cells in a row. Use pinch-to-zoom to make the game board larger or smaller, and drag the game board to move it. If you resize or move the game board until the numbers along the edges aren't visible then a white triangle will appear near the top left corner of the screen. Tapping the white triangle will cause the numbers to be visible until you lift up your finger. Also see Let's IQ Nonogram (below) and NonoCube (below).

Cryptogram by Andreas Schulz (free) - A challenging puzzle in which the numbers in several math problems have been replaced with colored squares. There are three rows of math problems and three columns of math problems. To play, drag a number from the top of the screen onto a colored square. To remove a number from the math problems, drag it back to the top of the screen.

Curvy Free! by FlamingLunchbox (free) - Tap a hexagon to spin it (or spin it with your finger). The goal is to align all of the curved lines so they form fully-enclosed shapes. In other words, you must eliminate all of the loose ends.

Cut the Rope FULL FREE by ZeptoLab (free) - Slide your finger across a rope to cut it in order to feed the candy to Om Nom, collecting as many stars as possible.

Eccentricity by Simon McKinney (free) - The object is to drag a black hole to the appropriate position in space, then shoot a missile so that it's guided by the black hole's gravity to hit the purple gem (without hitting any obstacles and without flying off of the screen). On higher levels there are more black holes which you must position appropriately. Tap the "white triangle" icon to shoot the missile, and tap the "circular arrows" icon to restart the level, and tap the "gear" icon for a hint or to select a different level. The frame which contains these icons can be dragged to a different place on the screen if the icons are covering up something.

Einstein's Logic Lite by Agent0013 Design (free) - The object is to use the clues to figure out the correct order for the digits from 1 to 5 (in the first row), and the correct order for the letters from A to E (in the second row), and the correct order for the dice values from 1 to 5 (in the third row), and the correct order for the symbols (in the fourth row). These are displayed in the top half of the screen.

There are four types of clues (displayed in the bottom half of the screen):

• One type of clue shows (for example) an A, followed by an up-and-down arrow, followed by a 2. This tells you that the A and the 2 are in the same column.
• Another type of clue shows (for example) a Circle, followed by a left-and-right arrow, followed by an E. This tells you that the Circle is in a column which is directly next to the column containing the E (either to the left or the right of the E).
• Another type of clue shows (for example) a B, followed by three dots, followed by a Square. This tells you that the B is in a column which is somewhere to the left of the column containing the Square.
• The last type of clue shows (for example) a 5, followed by a Triangle, followed by a C. This tells you that the column containing the Triangle is directly next to the column containing the 5 on one side (either the right side or the left side), and the column containing the Triangle is also directly next to the column containing the C on the other side.

Flood-It! by LabPixies (free) - You have a limited number of moves to fill the board with one color, starting at the top left corner. When you tap a colored ball at the bottom of the screen, the top left square (plus any adjacent squares of the same color) will change to the color you tapped. Also see Color Zen (above).

Flow Free by Big Duck Games LLC (free) - Slide your finger across the playing grid to create a path from one colored circle to its matching colored circle, without crossing any other paths. Beneath the game board, the left arrow takes you to the previous level, and the "curved arrows" icon resets the current level, and the right arrow takes you to the next level, and the question mark gives you a hint. Also see Flow Free: Bridges (below) and Flow Cube (below).

Flow Free: Bridges by Big Duck Games LLC (free) - This is the same as "Flow Free" (above), with the addition of a bridge which allows you to cross over one path. This makes the puzzle trickier because you must determine which colored path needs to go under the bridge, and which one needs to go over the bridge. Also see Flow Free (above) and Flow Cube (below).

Flow Cube by Blue Fire (free) - This is the same as "Flow Free" (above), but it's played on three faces of a cube. This adds a bit more spatial reasoning to the puzzle. Also see Flow Free (above) and Flow Free: Bridges (above).

FlowDoku by HapaFive (free) - This is a Sudoku type of puzzle, but with symbols instead of numbers. In the 6x6 boards, each row and column must contain three blue squares and two green triangles and one orange oval. Also, each 3x2 box must contain three blue squares and two green triangles and one orange oval, with the additional rule that the blue squares must be connected to each other and the green triangles must be connected to each other. Tap a cell repeatedly to change its color, or tap a colored symbol and drag it to an empty cell. The 8x8, 9x9, and 12x12 boards have different requirements, and the requirements are displayed at the bottom of the screen while you're playing a game.

Foozle by Noodlecake Studios Inc (free) - Tap the orange and yellow creatures to transform them between a circle and a square. When they're in the form of a circle then they can roll. The goal on each level is to knock all of the orange creatures off of the screen, but keep all of the yellow creatures on the screen.

Freeze! by Frozen Gun Games (free) - The goal is to get the eyeball safely to the hypnotic spinning spiral. To do this, rotate the gameboard to make the eyeball go in the direction you want, avoiding all of the sharp pointy objects (you can safely ignore any birds that fly by). Some levels have a "Freeze" button, which will lock the eyeball in its current position. This allows you to rotate the gameboard without moving the eyeball so you can line up the eyeball before unfreezing it. The little number next to the "Freeze" button indicates how many times you're allowed to freeze the eyeball.

Futoshiki by Dambus Games (free) - The game board is a 5x5 grid. Using logic, you must fill in the unique digits from 1 through 5 in every row and every column. You also need to make sure that the numbers obey the "less than" and "greater than" signs between some of the squares. To place a number, tap a square and then tap a number. To clear out a square in which you've placed a number, tap the square and then tap the "Clear" button. To make notes in a square, tap the square and then tap the "Note" button to highlight it, then tap one or more numbers. The numbers will be placed into the selected square using a small font. To erase the entire board and start over, tap your phone's menu button (if it has one) and then tap "Clear All."

Gravirings by bytechaos (free) - A physics-based puzzle in which you must get the ball into the spinning hypnotic spiral. Tap a rectangular block at the proper time, which will remove the block, to make the ball fall and/or roll into the spiral.

Interlocked by Armor Games (free) - Each level is a simulation of a wooden puzzle in which various pieces are interlocked. Drag your finger outside of the puzzle to rotate the puzzle. Tap and hold a wooden puzzle piece to select it, then try to drag it to a new position. When you're able to remove a piece from the puzzle, the piece will disappear off of the edge of the screen.

Kakuro Free: Number Crosswords by Square Root Games (free) - A nice Kakuro game, which is similar to a crossword puzzle but with numbers. The object is to place a digit (1 through 9) into each empty cell on the game board just like you would write words in a crossword puzzle, so that the sums of the digits in each "word" are the same as the clues for each "word" (the white numbers). Duplicate digits are not allowed in a "word." To place a digit into a cell, first tap the cell (which turns it white), then tap a digit. When you complete a "word," if the sum is correct then the clue number will turn green. If the sum is incorrect then the clue number will turn white. At the top of the screen, the first icon will return you to the Main Menu. If the "pencil" icon is white when you tap a digit, then the digit will be placed into the cell using a large font. Tapping the "pencil" icon will turn it red, which means that when you tap a digit then the digit will be placed into the cell using a small font (this allows you to place several possible digits into the same cell to help in figuring out the logic). The "curved arrow" icon is the "undo" icon. The "X" icon will empty out the highlighted cell. The "question mark" icon will provide a hint, but you can't get another hint until the "question mark" icon turns fully white again. Even though some simple math is involved, this is more of a logic puzzle.

KenKen Classic II by KenKen Puzzle Co. (free) - Similar to sudoku puzzles, but with a twist. Like sudoku, you must place the unique numbers from 1 to 4 (if you choose a 4x4 puzzle) into every row and every column. The twist is that the numbers in a bolded section of the grid must add up to the number which is displayed in that section. So if a section contains "3+" then the cells in that section must equal 3 when they're added together. If a section contains "2-" then the cells in that section must equal 2 when they're subtracted from each other (in any order), and so on. If a cell contains "3" without a math operator then you simply need to put a 3 in that cell. To play, tap a cell to highlight it in yellow, then tap a number to place the number into that cell. To enter multiple numbers into a cell in a small font, tap the "green notebook" icon at the bottom of the screen, then tap the numbers. Tap the "pink notebook" icon to enter a single number into a cell in a large font.

Kings Kollege: Nambers by Armor Games (free) - Modify a grid of numbers so it matches the target grid. To modify the numbers, slide your finger from one number to the same number which is adjacent to it (horizontally, vertically, or diagonally), such as fives which are adjacent to each other, to connect them. The tricky part is that you must connect exactly 2 twos, or 3 threes, or 4 fours, or 5 fives, and so on. After you connect the numbers, slide your finger left or right across the screen to change the connected numbers to any other number (or use the left/right buttons which can be enabled in the settings). Changing the connected numbers to a better number will allow you to connect a new set of numbers, and so on, until you've matched the target grid.

Laser Tank by Enzure Digital (free) - A nice Laser Tank clone for Android. The goal is to move your tank one square at a time to reach the flag. You can shoot laser bolts to move objects, such as pushing an object into the water to create a bridge for crossing a stream. You must avoid anti-tank laser turrets, and you can fire lasers at mirrors in order to destroy the anti-tank laser turrets. Sometimes there will be conveyor belts, thin ice, teleporters, and so on.

Laserbreak Lite by errorsevendev (free) - A "laser beam" puzzle, which is better than the others I've tried. Tap the laser turret to select it, then slide your finger to rotate the turret in order to aim the laser beam. The goal is to destroy the red square using the laser beam. Every blue surface will reflect the laser beam, and you can tap some of the blue objects to select them in order to rotate them. Sometimes there will be wooden objects that you can burn up with the laser, or other objects that you can manipulate, or teleporter devices, etc.

Let's IQ Nonogram by PuzLogical (free) - A nice Nonogram, or Hanjie, or Paint by Numbers, or Griddler, etc. type of puzzle, which makes pictures in black and white or in color. The user interface has some unique and handy features, which are explained quite well in the Help pages. At the top of the main screen, the "five stars" button allows you to choose which puzzle to play. The "world globe" button allows you to play puzzles which were created by fans of the game. The "paintbrush" button allows you to create your own puzzles. The "question mark and exclamation mark" button displays the Help pages. The "gear" button brings up the Settings screen. The "Nonogram library" button will download new packs of puzzles. Also see CrossMe Color (above) and NonoCube (below).

Mastermind (Code Breaker) by APPart (free) - A nice Mastermind puzzle, which is better than the others I've tried. I like that I can set it up so it doesn't choose multiples of the same color in the secret code.

Minesweeper 3D by Pink Pointer (free) - This is Minesweeper but played on a variety of 3D surfaces. This adds a new and challenging dimension to the game (no pun intended). Tap the "flag" icon to mark the position of a bomb on the game board. The icon on the far right doesn't do anything when you tap it, but it lights up when you slide your finger across the screen to rotate the 3D game board.

NonoCube by Graycode Software (free) - A 3D Nonogram, or Hanjie, or Paint by Numbers, or Griddler, etc. puzzle. On the level selection screen, tap a cube which has a question mark on it, then tap "Solve." Drag your finger to rotate the 3D object, or use pinch-to-zoom to resize the 3D object. The numbers on the outer edges of the 3D object tell you how many small cubes will be in that row/column when the final object is revealed. So if there are 5 small cubes in one row of the unsolved object, and if that row has the number 5 on the end of the row, then you know that all 5 small cubes will be in that row when the final object is revealed. Therefore, you would tap the "shield" icon to highlight it, then tap all 5 of those small cubes to turn them green (to protect them from being removed). If a row has a 0 at the end of the row then you would tap the "bomb" icon to highlight it, then tap all of the small cubes in that row to remove them. For a faster method when all of the small cubes in a row need to be protected, you can tap the "multi-shield" icon to highlight it, then tap the end of that row (which highlights the entire row in blue), then tap the large "multi-shield" icon which appears. You can remove an entire row in a similar way using the "multi-bomb" icon. To see the interior of the 3D object, slide one of the arrows which are floating near the 3D object. After you reveal the hidden object, it will be shown floating in front of the level selection screen. Tap the object to return to the level selection screen. Also see CrossMe Color (above) and Let's IQ Nonogram (above).

One touch Drawing by Ecapyc Inc. (free) - Slide your finger from one point to another on various shapes without crossing your path, so that you draw the entire shape without lifting your finger off of the screen. The "left-arrow" icon takes you back to the previous screen, and the "curved arrow" icon resets the current level.

Overpaint by LANDKA (free) - Slide the colored rectangles from the corners of the screen to cover up (and remove) all of the colored circles, in as few moves as possible. The tricky part is that sometimes the colored circles are moving, and sometimes you need to figure out the correct combination of colors to remove the circles.

Paperama by FDG Entertainment GmbH & Co.KG (free) - An origami (paper folding) game. Drag a part of the paper to fold it so that it creates the shape which is shown in white dashed lines. The "Limit" number shows how many folds you're allowed to make.

Pipes by ben or dan (free) - Tap the sections of pipe to spin them so that every section of pipe turns from red to green (when they're connected properly). To undo a move, use your phone's Back button.

PIX.pix Pixel Picture Logic by Unit7 Games (free) - The goal is to reveal a picture in the game grid by turning the appropriate cells to gray based on the clues. If a cell has a number in it, this tells you how many gray cells it's touching. So if a cell has a 3 in it then that cell is touching exactly 3 gray cells (which might or might not include the cell with the 3 in it). To start a puzzle, tap the "X" icon on the left side of the screen, then tap all of the cells which are touching any cell with a 0 in it (including the 0 itself). In other words, since the cell has a 0, we know that we can cross out all of the cells that are touching the 0 cell. Similarly, if there are any cells with a 9 in them, tap the "pencil" icon on the left side of the screen, then tap all of the cells which are touching any cell with a 9 in it (including the 9 itself). In other words, since the cell has a 9, we know that we can turn all of the cells to gray that are touching the 9 cell. Now look around the edges of the grid to see what other cells can be crossed out or turned to gray, then use the remaining clues to fill in the rest of the grid.

Puzzle Retreat by The Voxel Agents (free) - To start the game, follow the animated finger by dragging the wooden tile with five dots on it to the right. The object of each level is to fill in every hole with an ice cube. Tap a wooden tile which contains one or more ice cubes in it, then drag it onto the game board. Each ice cube will drop into the first hole it comes to. Other ice cubes that you drag will glide over an ice cube which is already in a hole.

Random Mahjong by Paul Burkey (free) - A nice Mahjong Solitaire game. Tap a tile on the outer edge of a stack of tiles (or one that's on top of a stack of tiles) to select it, then tap a matching tile on the outer edge of a stack (or on the top of a stack). The matching tiles will be removed, opening up new tiles. Try to eliminate all of the tiles. The icon at the top left shows or hides the status bar. The icon at the top right pauses the game. The icon at the bottom left shows or hides the icon bar at the bottom of the screen. The first icon in the icon bar toggles the look of the tiles. The second icon allows you to select a background color. The third icon gives you hints (on the first tap it shows or fades out the tiles which are not available to be played, and on the second tap it marks the matching tiles). The fourth icon will undo the previous move (up to three moves). If the fifth icon is blue then you can't move or zoom the game board. Tap the fifth icon to turn it red, then you can pinch-to-zoom or move the game board.

Rescue Roby FULL FREE by Runaway Studios Inc. (free) - The goal is to get Roby the robot into a marked wooden crate, collecting all three stars on each level. When there are other wooden crates in his way, tap one or more of the crates to destroy them (the trick is to get the timing right). Some crates have a bomb in them, which will push Roby and other crates when you tap the bomb.

Rings by Perun Labs (free) - Rotate the rings to place the colored balls into the correct positions (the red balls need to go into the red slots, and so on). Sometimes there will be a pair of gray balls which are attached to each other. These gray pairs of balls can't be separated from each other, which adds an extra challenge to the puzzle.

RoboZZle Droid by l0st (free) - The goal in each level is to move the robot from square to square in order to collect all of the stars. The tricky part is that you must program the robot's steps ahead of time, then press the green "play" icon to see if you programmed the robot correctly. The squares that the robot travels on are either blue, red, or green, so your program will tell the robot what to do when it's on certain colors. For example, a program might go something like, "On a blue square turn left. On a red square turn right. Otherwise go straight. Repeat from the beginning." Your main program is called F1 by default, and on some levels you can create small subroutines called F2, F3, and F4.

Rote by eXiin (free) - Move the yellow ball by swiping your finger, and try to get it to the exit. The ball can push blocks if there's room for the blocks to move, so the challenge is to move the blocks to create the opening you need in order to reach the exit.

the Sequence by One Man Band (free) - Use robotic modules to build a machine which transfers white circles from the generation unit to the collection unit. On the "Select Node" screen, tap an orange square to play that level. The gameboard is a grid which contains a Collector (with a purple circle inside it) and a Generator (with a white circle inside it). At the top of the screen there are two tabs. The "Build Mode" tab allows you to build the machine, and the "Sequence Mode" tab allows you to run your machine. In the "Build Mode" tab, the robotic modules are at the bottom of the screen. The square module can push or pull other objects, and the circular module can rotate to move another object 90 degrees. To use a module, drag it onto the gameboard, then tap it to highlight it. This allows you to change the module's sequence number, or rotate the module, or reverse the module's "polarity" (its direction). Tap the "checkmark" button when you're finished customizing the modules. After you've placed and customized all of the modules, tap the "Sequence Mode" tab. At the bottom of the screen, tap the triangular "play" button to run your machine. If your machine successfully transfers three or more white circles from the generation unit to the collection unit (without any collisions) then you've completed the level. Keep in mind that one robotic module can move another robotic module.

Shapist by qixen-p design llp (free) - Swipe the colored shapes out of the way in order to expose the hexagon (which is made up of six orange triangles). Tap the hexagon to continue to the next level.

Shikaku by Novellectual (free) - The gameboard is a grid in which some of the cells contain a number, and the goal is to drag your finger to turn all of the cells white. The tricky part is that if a cell contains the number 3, for example, then that cell needs to be part of a group of 3 cells. If a cell contains the number 8 then that cell needs to be part of a group of 8 cells, and so on. Each group of white cells must contain exactly one number.

Ship Attack - Brain puzzle by Scoompa (free) - An interesting twist on the Battleship Puzzle or Bimaru or Battleship Solitaire type of game. The object is to use the clues to place the ships into the correct positions on the game grid. Every ship is completely surrounded by water (imagine that the game grid is surrounded by water as well). The twist is that in order to see the clues, you have a limited number of planes and satellites and spies which can examine a section of the game grid and show the clues for that section. After you have identified the locations of the ships, tap the "Attack" button. A squadron of bombers will fly over the game grid and destroy the parts of the ships which you identified correctly. In addition to the Easy, Medium, Hard, and Expert levels, there's also a Puzzles level which contains mini versions of the game, and which might be helpful in learning the strategy for this game. Also see Battleship Solitaire Puzzles (above).

Slide by Perun Labs (free) - The game board is a 5x5 grid of colored squares, and above the game board is a picture showing the target pattern that you need to create. When you swipe your finger left or right or up or down, the row or column that you're touching will slide in the direction you swiped, and the colored squares will wrap around to the other side. The goal is to slide the rows and columns in order to create the picture displayed above the game board.

Slide Box Puzzle by xApps (free) - The object is to move the small silver box until it's inside of the large silver box. However, the only thing you can move is a silver ball. When you move the silver ball into a box, then you can move the box.

Slitherlink (free) by Ejelta LLC (free) - The game board is a grid made up of faint gray lines, and some of the grid cells contain a red number. When you tap one side of a grid cell, that side becomes a darker color. The goal is to draw a closed loop (like a fence) which doesn't cross over itself. If a grid cell contains a 1 then exactly one side of that cell is part of the fence. If a grid cell contains a 2 then exactly two sides of that cell are part of the fence, and so on. When you've placed the proper number of fence pieces around a grid cell then the red number in the grid cell will turn black. If a fence piece is red then it's invalid. If you tap the lower icon at the bottom left side of the screen, then tapping a side of a grid cell will place or remove an "X" on that side of the grid cell (to remind you that this side of the cell is not part of the fence). If you tap the upper icon at the bottom left side of the screen, then tapping a side of a grid cell will place or remove a section of fence. The "magnifying glass" icons at the bottom right side of the screen will zoom in or out (you can also use pinch-to-zoom). The "curved arrow" icons above the "magnifying glass" icons are the undo/redo icons. The three ribbons at the top right side of the screen are bookmarks. Tap one to bookmark the current state of the game board, and tap it again later in order to restore the state of the game board (long-press a ribbon to delete the bookmark).

Sudoku Free by AI Factory Limited (free) - I find this app more intuitive and easier to use than the other Sudoku apps I've tried. Tap a grid cell on the game board, then tap a number from 1 to 9 to place that number into the grid cell. If you tap the "Notes" button to light it up then the next number you tap will be placed into the grid cell in a tiny font (as a note to remind you of a possible number for this grid cell). In order for the "Notes" button to function this way, you need to disable the "Quick Notes" feature in the Settings.

Taiji Challenge (formerly Takuzu) by Soft Cyd (free) - A nice Takuzu puzzle, which is better than the others I've tried. The object is to place a 0 or a 1 into every cell in the game grid. There will always be the same number of 0's and 1's in each row and column, and there can't be more than two consecutive 0's or two consecutive 1's in a row or column, and each row must be unique, and each column must be unique (on higher levels, this uniqueness sometimes becomes an important part of your logic).

Tangram HD by Pocket Storm (H.Jin) (free) - A nice version of the Tangram puzzle. Drag the various shapes into the outline of a picture, rotating the shapes as needed, in order to completely fill in the outline with the shapes. The button at the top of the screen (displaying a curved line with an arrow at each end) will flip over the selected shape.

TransPlan by Kittehface Software (free) - A physics-based puzzle in which you must get the blue block into the blue square. Tapping an object causes it to fall, and it will interact with other objects that it encounters. On most levels you can stick a push-pin into an object such as a rectangle, which will cause the rectangle to rotate around the pinned location when another object lands on it. Usually there's also an eraser which you can use to strategically erase certain objects.

Twisty Planets Space Puzzle by Crescent Moon Games (free) - Tap on the screen or use the arrow buttons to move the robot from square to square in order to collect all three stars, then move the robot to the teleporter to finish the level. The tricky part is that to reach the stars and the teleporter you must rotate the "world" in three dimensions without causing the robot to fall off.

Unblock Car by Mouse Games (free) - A nice version of the Rush Hour puzzle. Drag the cars out of the way in order to create a clear path for the red car to be able to exit the game board (through the opening at the left edge of the screen). The first icon at the bottom of the screen will pause the game. The second icon will reset the current level. The third icon will give you hints. The fourth icon will undo the previous move.

Under the Sun - 4D puzzle game by Stegabyte (free) - Move the castaway to the camp fire before the sun sets. To move him, tap one of the squares containing an arrow (or tap the square that he's on if you want him to stay on that spot). The tricky part is that each time you tap a square, time will advance forward quite drastically. The castaway starts off each level as a young-ish man, but after a couple of moves he will be stooped over with graying hair. Trees will grow quickly with each move you make, and tortoises will age, and bridges will quickly become aged and brittle, and so on. If the castaway dies of old age before reaching the camp fire then you can turn back time by rotating the wheel on the right side of the screen in order to try again.

Water Logic by HappyFaceDevs (free) - In each level there are two empty water glasses (e.g. a 4 Liter glass and a 7 Liter glass), and at the top of the screen you're given a task to perform (e.g. "Put 1L in 7L glass"). You must figure out how to fill and empty the glasses in order to accomplish the task. In this example, you would drag the 4L glass to the water faucet, then lift your finger to fill up the glass. Drag the 4L glass to the 7L glass, then lift your finger to pour the water into the 7L glass. Fill up the 4L glass and pour it into the 7L glass again, leaving 1L in the 4L glass. Drag the 7L glass to the trashcan and lift your finger to empty the glass. Pour the 4L glass into the 7L glass to accomplish the task. The number of moves you've made is displayed at the top left corner of the screen, and below this is the target number of moves (in order to get 3 stars for the level). At the top right corner of the screen, the "left arrow" icon will undo your previous moves (one at a time), and the "curved arrow" icon will reset the level.

• February 09, 2016 - Added Eccentricity, Futoshiki, KenKen, NonoCube, PIX.pix Pixel Picture Logic, and Shikaku.
• January 14, 2015 - Added Cat Physics, Curvy, Foozle, Freeze, Gravirings, Interlocked, Laser Tank, Laserbreak, Let's IQ Nonogram, Nambers, Overpaint, Paperama, Rescue Roby, RoboZZle Droid, Rote, Shapist, TransPlan, Twisty Planets, and Under the Sun.
• June 29, 2014 - Added 2048, Chess Light, Rings, Slide, and Water Logic.
• October 08, 2013 - Added Color Drips, Color Zen, CrossMe Color, and FlowDoku.
• March 23, 2013 - Added 3qual, Battleship Solitaire Puzzles, Kakuro, Puzzle Retreat, Ship Attack, and Slide Box Puzzle.
• December 22, 2012 - New page.