Lexo is a private AI keyboard for Android. Voice typing and next-word prediction both run entirely on device, so once setup is done the keyboard keeps working with no internet connection, in airplane mode, and anywhere the signal drops.
After installing, open Lexo once to switch it on. The app walks you through it: pick your language, turn Lexo on in Android’s keyboard settings, make it your keyboard, then try it out.
Cloud keyboards send what you type to a server and wait for the answer. Lexo puts the models on your phone instead: the typing model downloads once, plus the speech recognizer if you use voice, then they live in the app’s private storage. Nothing you type or say leaves the phone. No sign-up, no ads.
Offline voice typing (Premium)
- Speak instead of typing, anywhere a keyboard works
- Speech to text runs locally; no audio is ever uploaded
- Optional cleanup adds punctuation, capitalization and filler removal, on the phone (off by default)
- Names in your personal dictionary come out spelled your way, and saying a text shortcut inserts its full text
- English dictation with cleanup on matches the app: chat messages skip the final period, email keeps full punctuation. Change it per app
- English, Spanish, Portuguese, German, French, Swedish, Polish, Turkish and Czech
On-device AI suggestions (Premium)
- A local language model predicts your next word and the phrase likely to follow
- Autocorrect that fixes typos as you go
- Glide typing: swipe across the letters to write a word
- A personal dictionary learns your names, slang and shortcuts, and never leaves your phone
- Typing in English, Spanish, Portuguese, German, French, Swedish, Polish, Turkish and Czech
Why local AI changes the typing experience
- No latency floor. Suggestions never wait on a round trip, so the strip keeps up with a fast thumb.
- No dead zones. A plane, a basement, a tunnel: offline AI behaves the same everywhere.
Private because of how it is built
- Once setup is done, typing and dictating generate no network traffic. Check it yourself with a network monitor.
- Internet access is used for the model downloads, Google Play billing, and crash reports, which stay off unless you turn them on in Settings.
- The permission list is short: microphone for dictation, vibration for key feedback, notifications for download progress, plus internet and network state.
- No keystroke logging, no typed text in analytics, no profile built from what you write.
Everything else you expect from a keyboard
- Ask Lexo: change a setting or get an answer by asking in your own words, answered on your phone
- Quick switching between languages and layouts
- Emoji keyboard and clipboard history
- Light and dark themes with automatic day and night switching
- One-handed mode for larger phones
- Customizable key sounds, vibration, and gestures
Pricing, and what happens after the trial
Lexo is a paid keyboard. Every install starts with a 30-day Premium trial covering everything the on-device models power: offline voice typing, next-word prediction, the suggestion strip and autocorrect, and glide typing.
After that those features stop until you buy Premium: a one-time purchase, not a subscription. Without Premium the keyboard still types: layouts, language switching, emoji, clipboard history, themes, one-handed mode and gestures. No ads either way.
About the first-run download
Setup downloads the typing model for your language once, over Wi-Fi by default. Its size depends on the language. Voice typing downloads its own speech pack the first time you use the microphone, and each extra language adds its own. App updates do not re-download any of it.
Built on the open-source FlorisBoard project, with open-weight models: SmolLM2, Qwen2.5 and KB-Whisper (Apache-2.0), a Turkish GPT-2 fine-tune (MIT), Gemma (Gemma Terms of Use) and NVIDIA Parakeet (CC-BY-4.0).
Questions, bug reports, feature requests: reddit.com/r/lexokeyboard.
View on Google Play StoreFree or paid:
- Paid with one-time purchase
Accessibility and User Comments:
Following the release of the Pixel 11-series that came onboard with “Rambler,” a new experience of voice typing, more and more Devs are coming up with creative methods of achieving the same experience for non-Pixel 11-series users. Thus, we’re here talking about “Lexo Keyboard,” a keyboard that works entirely offline once you download the model needed for offline use.
I spent a lot of time working with the Developer to make the app accessible, and I’m proud of this Developer for his work in ensuring that the keyboard is accessible.
Thus, the keyboard supports “lift-to-type” using TalkBack.
I put the keyboard to use on both my Galaxy S23+, running One UI 8.5 (Android 16), and my Pixel 11 Pro XL, running Android 17. The voice dictation works similarly across the two devices.
What is worth mentioning, however, is that in order to be able to double-tap anywhere on the phone to stop voice dictation, you would have to go to TalkBack Settings > Advanced settings > Reduce delay > Typing preference and choose “Hold finger to select letter key, then lift. Double-tap for other keys.”
If you use “Hold finger to select any key, then lift” instead, you need to tap the voice input key directly to stop voice input, as tapping outside the keyboard area won’t stop it.
There are lots of settings on the keyboard that you can customize to your liking. Take advantage of those and customize the keyboard to your liking.
The app is available to anyone with access to the Play Store. When it comes to pricing, there’s a one-time payment of 10 bucks. Without the one-time payment, you can use the app with all features enabled for a period of 30 days.
After those 30 days, you wouldn’t have access to the premium features, but even as a free user outside of the 30-day free period, there are no ads.
You can listen to my Blind Android Users podcast audio demo of the keyboard Here
Last Tested App version and Android version:
2.0.37. Android 17
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