Thumb-Key APK v5.1.19 · Latest Version for Android
Thumb-Key is a privacy-conscious keyboard with a 3x3 grid and swipes for less common letters, designed for fast thumb typing.
- Version
- 5.1.19
- Updated
- Oct 29, 2026
- Size
- 9.1 MB
- Requires
- Android 7.0+
- Developer
- heretic
- Category
- Personalization
- License
- AGPL-3.0
- Package
- com.dessalines.thumbkey
Screenshots
What is Thumb-Key?
Thumb-Key takes a fresh approach to phone typing. It uses a 3x3 grid of large keys, with common letters on taps and rarer ones on swipes. Because keys never move, your thumbs learn their positions and you can type without looking.
Key Features
- Large 3x3 grid keys
- Swipe gestures for less common letters
- Layouts for many languages
- No word prediction or data collection
- Customizable size and themes
Getting Started
Expect a learning period of a few days. Try the built-in practice mode, then switch to it for daily typing.
Open Source and Privacy
Thumb-Key is developed in the open by heretic and released under the AGPL-3.0 license. The code is hosted at github.com/dessalines/thumb-key, so anyone can check what the app does. The version on this page has no ads or tracking libraries flagged by F-Droid.
How to Install Thumb-Key APK
- Tap Download and get the Thumb-Key v5.1.19 APK (9.1 MB).
- Optional: compare the file’s SHA-256 checksum with the one on the download page.
- Open the file and allow your browser or file manager to install unknown apps if asked.
- Tap Install. Updates from the same source install over this one and keep your data, because they are signed with the same key.
Previous Versions
- v5.1.18 (9.1 MB, 2026-10-08)
Frequently Asked Questions
Is Thumb-Key free?
Yes. Thumb-Key is free and open-source software released under the AGPL-3.0 license. It has no ads and no paid version is required to use it.
Is this Thumb-Key APK safe?
The APK on this page is the original file published in the F-Droid repository, unmodified. Its SHA-256 checksum is listed on the download page so you can verify it, and the full source code is public.
What Android version does Thumb-Key need?
Thumb-Key v5.1.19 requires Android 7.0 or newer.
Where can I find the source code of Thumb-Key?
The source code is available at https://github.com/dessalines/thumb-key. You can read it, report issues or contribute there.
