Chogan is a collection of small, finishable games in a single app. It ships with four 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 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 thirty awards * Stats and a profile * Persian and English 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.