FUTO Keyboard

FUTO Keyboard is a keyboard app by FUTO, the company behind Grayjay. Its README sets the goal: “The goal is to make a good modern keyboard that stays offline and doesn’t spy on you. This keyboard is a fork of LatinIME, The Android Open-Source Keyboard, with significant changes made to it.” FUTO’s website says it “is still under active development, and you may experience missing features or languages.”

What it does

• Voice typing on the phone, with OpenAI’s Whisper speech model fine-tuned by FUTO. A small English model is built in; English models of other sizes and multilingual models are downloads.
• Swipe typing with FUTO’s own models, which work on any layout for reading the gesture; the part that turns it into words is English and QWERTY only.
• Next-word prediction and autocorrect with a small transformer language model, on by default, for English. FUTO’s docs say: “On low-end devices, the Transformer LM may run too slowly.” Training the model on your own typing is a separate setting, off by default.
• Japanese and Chinese input, built on the open-source Mozc and RIME engines, a clipboard history, a text-editing panel and themes. Version 0.1.30 added themes you can create and share as files, a new layout for swiping in English called KASROZ, and clearer visual and haptic feedback for the optional swipe gesture that switches languages.

Why it is so big

The models are in the file. From our look inside it: the built-in English voice model is 43.6 megabytes and the English language model 30.7 megabytes; the swipe models add about 10 megabytes, and there are dictionaries for English, German, Spanish, French, Italian, Brazilian Portuguese and Russian, emoji names, and native code for four processor types.

The licence

FUTO Keyboard’s source code is published, but under the FUTO Source First License 1.1-kb, which isn’t an open-source licence. “You may use the software for any purpose.” Changing it is allowed “only for non-commercial purposes”, and “You may distribute the software or any part of its source code only if you do so free of charge for non-commercial purposes.” Distributors must not remove the payment features, and “You must ensure that anyone who gets a copy of any part of the software from you also gets a copy of these terms.” We host the app unchanged and free of charge, with a word-for-word copy of the licence file from version 0.1.30 linked under the download button. It differs from the licence of FUTO’s Grayjay, which limits use to non-commercial purposes too.

Parts of the app have their own terms: the word lists are “© Lexiteria LLC. Used by permission.”, a permission FUTO has, and the swipe models come under FUTO’s model weights licence, which asks products using them to say they are “powered by “FUTO Swipe” technology”. The original Android keyboard code it started from is under the Apache License 2.0.

About this file

• This is version 0.1.30, released on 4 August 2026, from FUTO’s own F-Droid repository. It is byte for byte the APK on FUTO’s GitHub releases page, and signed with the key whose fingerprint FUTO’s README gives “for all versions except Google Play” (74:3F:AD:58…F9:95).
• The 140.2 MB file runs on ARM and x86, 32- and 64-bit, and needs Android 7.0 or later. It declares 12 permissions, among them the microphone for voice typing, your personal dictionary, and pictures, which the clipboard manager uses to read screenshots. There is no internet permission.
• Our tracker scan matches ACRA, the crash-reporting library. In this build it only offers to send a report by e-mail, as described above; its upload code is commented out.
• About every ten weeks the keyboard shows a reminder to check for updates, since it can’t check by itself; tapping it opens FUTO’s update page with your version number. FUTO points to F-Droid or Obtainium for automatic updates.
• Known problems in 0.1.30 include missing long-press symbols on the new KASROZ and ClearFlow layouts (issue #2196).
• The screenshots are FUTO’s, from its F-Droid repository.

CPU types in this build: arm64-v8a (64-bit ARM, almost every phone since 2017); armeabi-v7a (32-bit ARM, older and budget phones); x86 (32-bit Intel, emulators); x86_64 (64-bit Intel, emulators and Chromebooks).

Versions currently kept in the FUTO repository. We host and check only the newest one.