Fillomino is played on a rectangular grid with no standard size; the internal grid lines are often dotted.
Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into polyominoes (by filling in their boundaries) such that each given number n in the grid is part of an n-omino and that no two polyominoes of matching size (number of cells) are orthogonally adjacent (share a side).

// Option A //

To download Fillomino - Color By Number mod from HappyMod.to.
You need enable the option "Unknown Sources".
1. Click on the above link to download Fillomino - Color By Number mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Fillomino - Color By Number from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.to - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Fillomino - Color By Number in HappyMod App.