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Guileless Bopomofo Keyboard

A simple Bopomofo software keyboard (input method editor) for typing Hanyu
New in version 4.0.13
Hi there! Guileless Bopomofo 4.0.13 is a housekeeping release.

* The keyboard no longer reloads itself every time you move to another text field. A form of short boxes, the six of a one time password say, used to rebuild it once per box.
* Holding the backspace key now deletes on the main thread, so a long press can no longer upset the engine.
* Tidied up a good deal of the code behind all of this, with more tests to keep it honest.

Thanks for using Guileless Bopomofo!
Hello, it's me, Guileless Bopomofo Keyboard.

I have implemented most features of libchewing (https://chewing.im/), to provide you a choice of Bopomofo software keyboard (aka input method editor).

* Unlike other similar products, though I don't have fuzzy, error-tolerance design, I do still have ability to predict possible phrases by context, and I do remember phrases from your typing history automatically.

* Besides the most common "DaChen", I also provide you "Hsu", "E-Ten 26 keys", and "DaChen CP26" Bopomofo keyboard layouts.

* I also support physical keyboard input with the same layout options, so you can use a consistent Bopomofo experience across virtual and hardware keyboards.

My source code repository: https://github.com/hiroshiyui/GuilelessBopomofo

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 4.0.13 (213) suggested Added on Aug 05, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • control vibration
      Allows the app to control the vibrator.
    • org.ghostsinthelab.apps.guilelessbopomofo.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 12 MiB PGP Signature | Build Log

  • New in version 4.0.11
    Hi there! Guileless Bopomofo 4.0.11 improves emoji handling and refreshes the underlying engine.

    * Fixed emoji getting garbled while crossing between the app and the Chewing engine, so single-code-point emoji now display and store correctly in the candidate list and your user phrases. (#11)
    * Updated the libchewing engine and refreshed the build dependencies and Rust toolchain.

    Thanks for using Guileless Bopomofo!
  • Version 4.0.11 (211) - Added on Jul 15, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • control vibration
      Allows the app to control the vibrator.
    • org.ghostsinthelab.apps.guilelessbopomofo.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 12 MiB PGP Signature | Build Log

  • New in version 4.0.10
    Hi there! Guileless Bopomofo 4.0.10 fixes a physical keyboard issue.

    * Fixed the symbol picker on physical keyboards: pressing the `‵` key and choosing a category (such as brackets) now opens the second-level menu instead of dropping back to the input screen. (#73)

    Thanks for using Guileless Bopomofo!
  • Version 4.0.10 (210) - Added on Jun 09, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • control vibration
      Allows the app to control the vibrator.
    • org.ghostsinthelab.apps.guilelessbopomofo.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 15 MiB PGP Signature | Build Log