Chogan

Chogan is a collection of small, finishable games in a single app. It ships with eighteen games, and new ones arrive as updates to the same app.

The games:

* Tower Defence — four towers, three fixed maps plus a daily map, twenty waves and an endless mode
* Sudoku — four difficulties with a guaranteed unique solution, notes, hints and a daily challenge
* Minesweeper — no-guess generation, four sizes, chording and flags
* Dots and Boxes — two players on one phone, or three levels of AI
* Backgammon — two players or three levels of AI, dice that undo can never re-roll, gammons count double
* Mancala — Kalah rules, two players or three levels of AI
* Nonogram — three sizes, every puzzle solvable by logic alone
* FreeCell — the classic numbered deals, never the one unwinnable deal, unlimited undo
* Reversi — two players or three levels of AI
* Nine Men's Morris — two players or three levels of AI
* Peg Solitaire — leave one peg, in the centre for a perfect game
* Battleship — against an AI that only knows what you would know
* Bridges — three sizes, every puzzle with exactly one solution
* Code Breaker — three levels, colour-blind friendly
* Breakout — twelve fixed levels, three balls each
* Pasur — the Persian fishing card game against three levels of AI, with surs and the classic scoring
* Mahjong Solitaire — three layouts including the classic turtle, every deal solvable, with hints and shuffles
* Chess — against the AI on three levels or two players on one phone, plus Lichess puzzles

Around the games:

* A daily challenge that is identical on every device, with no server at all
* A weekly offline league with five tiers
* Over sixty awards
* Stats and a profile
* Persian, English, Simplified Chinese and German interface with light and dark themes

On privacy:

* The only permission the app declares is vibration. Not even internet access
* No ads, no in-app purchases, no analytics, no tracking
* Every asset ships inside the package. Even the sound is generated with WebAudio, so there is not a single audio file in the build
* Progress is stored on the device only, and Google auto-backup is turned off

Free and open source under the MIT licence.

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