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Chogan

Offline game collection: tower defence, sudoku, minesweeper, dots.
New in version 0.2.6
Tower defence: towers placed before starting wave 1 were thrown away when you left the screen. The game is now saved from the first tower on and comes back exactly as you left it.
Restarting in that state also asks first instead of silently clearing the board.
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, English and Simplified Chinese 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.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 0.2.6 (8) suggested Added on Oct 02, 2026

    This version requires Android 7.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • control vibration
      Allows the app to control the vibrator.
    • io.github.choganhq.chogan.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3 MiB PGP Signature | Build Log

  • New in version 0.2.5
    A third language: Simplified Chinese. The whole interface, all four games, the awards and the league are translated.
    If your phone is set to Chinese, the app now starts in Chinese.
    In settings, the language and theme pickers no longer overflow their card on narrow screens.
  • Version 0.2.5 (7) - Added on Sep 26, 2026

    This version requires Android 7.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • control vibration
      Allows the app to control the vibrator.
    • io.github.choganhq.chogan.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3 MiB PGP Signature | Build Log

  • New in version 0.2.4
    The app name and the interface now follow your phone's language instead of always starting in Persian.
    Sharing a result now sends a picture of the finished board, not just a line of text.
    The result panel has a close button, so you can look at the board you just finished.
    Minesweeper: the board sits in a real frame with curved corners.
    Tower defence: towers are built from a permanent bar instead of a popup.
    Thirty-five other fixes across all four games.
  • Version 0.2.4 (6) - Added on Sep 15, 2026

    This version requires Android 7.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • control vibration
      Allows the app to control the vibrator.
    • io.github.choganhq.chogan.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3 MiB PGP Signature | Build Log