Fill-a-Pix are exciting logic puzzles that form whimsical pixel-art pictures when solved. Challenging, deductive and artistic, this original Conceptis puzzle offers the ultimate mix of logic, art and fun while providing solvers with many hours of mentally stimulating entertainment.

Each puzzle consists of a grid containing clues in various places. The object is to reveal a hidden picture by painting the squares around each clue so that the number of painted squares, including the square with the clue, matches the value of the clue.

The game features a unique fingertip cursor which enables playing large puzzle grids with ease and precision: to fill a square, move cursor to the desired location and tap anywhere on the screen. To fill multiple squares, press and hold fingertip until cursor fills the square and start dragging to neighboring squares. The game also features a powerful Smart-fill cursor for quick, single-tap filling of all remaining empty squares around a clue.

For more fun, Conceptis Fill-a-Pix includes a Weekly Bonus section providing an extra free puzzle each week.


• 42 free Fill-a-Pix puzzle samples
• 8 extra-large puzzles bonus for iPad only
• Extra bonus puzzle published free each week
• Puzzle library continuously updates with new content
• Manually created by artists, top quality puzzles
• Unique solution for each puzzle
• Grid sizes up to 50x75 (65x100 for iPad)
• Multiple difficulty levels
• Hours of intellectual challenge and fun
• Sharpens logic and improves cognitive skills


• Exclusive fingertip cursor design for solving large puzzles
• Concurrently playing and saving multiple puzzles
• Puzzle library sorting and hiding options
• Portrait and landscape screen support (iPad only)
• Enlarge, reduce, move puzzle for easy viewing
• Smart-fill cursor for faster playing
• Unlimited Undo and Redo
• Auto-fill starting clues option
• Show errors during gameplay
• Check puzzle
• Track puzzle solving times


Fill-a-Pix have also become popular under other names such as Mosaic, Mosaik, Fill-In, Nurie-Puzzle and Japanese Puzzle. Similar to Picross, Nonogram and Griddlers, the puzzles are solved and the pictures revealed using logic alone. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world.

What's New

Version 4.7

This version improves performance and stability.

Ratings and Reviews

4.8 out of 5

86 Ratings

86 Ratings



Control system was my biggest issue, and it's finally fixed (after waiting many years). This actually is functional like it's on a touch screen now and they got the big and little selectors working with it too. My only quibble is the flash of purple when I use the big selector box which when I'm moving quickly is a bit distracting but compared to the annoyance of dragging a cursor around its minor. Thank you!!!

Love this!


I love doing Fil-a-Pix when I'm sitting somewhere waiting, on the phone, listening to the radio or a podcast, or whenever I've got some time to kill but don't want to have to engage my brain too much. I like that I can abruptly quit and have it exactly where I left off when I pick it up again. This and Two Dots are my go-to games.

Favorite app, but!


I absolutely love this app, It really gets my brain working!

I just really, really wish there were more free packages available! I have bought a few, but really can't afford to keep buying more.

Please offer more free options


Conceptis Ltd.
17.6 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Japanese, Simplified Chinese
Age Rating
Rated 4+
© Conceptis Ltd.
In-App Purchases
  1. Basic Logic - Variety 1 $2.99
  2. Advanced Logic - Variety 1 $2.99
  3. Basic Logic - Variety 2 $2.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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