Android keyboard (IME) for speech-to-text. Sends audio to any OpenAI-compatible Whisper endpoint of your choice — by default Groq (free tier available), can be pointed at OpenAI, Mistral, or any other compatible provider. Optional LLM post-processing.
- Real-time voice recording with amplitude visualization
- Processing queue — start a new recording immediately, previous ones transcribe in the background
- Offline-proof recovery — recordings that can't be transcribed are saved on the device and resent automatically as soon as a validated internet connection returns; they survive closing the keyboard, app rebuilds, and reboots, and are kept until successfully sent (a "resend" button is also available to force a retry)
- Works with any OpenAI-compatible Whisper API; ships with Groq as the default endpoint (whisper-large-v3-turbo). Free keys are available from both Groq and Mistral
- Configurable API endpoint, model, and language
- Multiple dictation languages — list several language codes in settings and a language key appears on the keyboard: tap to cycle, long-press to pick one. The formatting prompt follows the language you switch to
- Auto-start recording when keyboard opens
- Custom vocabulary — add names and technical terms to bias recognition; helps with contacts and rare words
- Drop period for single-word output — handy for voice search where a trailing period gets in the way
- Fix errors — corrects punctuation, spelling, removes filler words (um, uh)
- Shorten — makes text concise while keeping key points
- Emoji — adds relevant emoji to your messages
- Rhyme — rewrites dictated text as poetry
- Translate — translates to any of the supported languages
- Modes are switched with toggle buttons right on the keyboard, per recording
- Works with OpenAI, Claude, or any OpenAI-compatible provider (OpenRouter, Groq, …)
- Customizable prompts and temperature for each mode
- Reasoning models work too: their
<think>blocks are stripped before the text is inserted, and models that reject a custom temperature are retried without it - Provider presets (OpenAI, Claude, OpenRouter, Groq, Mistral, DeepSeek) fill in the endpoint and a model that exists there
- Send button (paper plane) — sends Ctrl+Enter for quick message sending in messengers
- Accelerating backspace — hold to delete slowly at first, then faster
- Punctuation keys —
.,?and!next to the space bar for when dictation gets the punctuation wrong; they swallow the space left by dictation, so "hello " +.reads "hello." - Smart spacing — dictated text gets a space in front when the cursor sits after a word, and never a doubled one before an existing space or full stop
- Clipboard bar stays visible after paste for repeated pasting
- Graceful shutdown — if keyboard hides during recording, audio is finalized and transcribed to clipboard
- 17 interface and transcription languages
- Light, Dark, and Auto themes
- Long-press spacebar to switch keyboard
- Built-in test recording in settings
- App logs and crash reports, saved to a file or shared straight from settings
- Auto-update from GitHub Releases
- Recordings that failed permanently can be resent or deleted from the keyboard (hold the resend key twice)
- Install the APK from Releases
- Open the app and tap Enable keyboard (or go to Settings → System → Languages & input → On-screen keyboard)
- Enable "Voice Keyboard"; the app shows whether it is enabled and which keyboard is active
- Enter a speech-to-text API key. Any OpenAI-compatible Whisper endpoint works:
- Groq (default, free) — get a key at console.groq.com/keys; nothing else to change.
- Mistral (free) — get a key at console.mistral.ai, then pick Mistral in the provider preset list (or set the endpoint to
https://api.mistral.ai/v1/audio/transcriptionsand the model tovoxtral-mini-latest). - OpenAI or any other compatible provider — pick the preset, or set the endpoint and model in the same screen.
- (Optional) Configure post-processing with an OpenAI or Claude API key, or any OpenAI-compatible provider:
- OpenRouter — provider "OpenAI-compatible", endpoint
https://openrouter.ai/api/v1(the rest of the path is added automatically), model with the vendor prefix, e.g.openai/gpt-4o-mini. The translation model can stay empty; it reuses the model you set. - Once post-processing is enabled, a row of toggle buttons (fix, shorten, emoji, rhyme, translate) appears on the keyboard above the space bar.
- OpenRouter — provider "OpenAI-compatible", endpoint
Obtainium is a third-party Android app that auto-updates apps directly from GitHub Releases. Recommended over the in-app updater if you want to avoid the system "install unknown apps" prompt and Play Protect warnings on each manual install.
- Install Obtainium from its releases page or via F-Droid.
- In Obtainium, tap Add App and paste
https://github.com/rustemar/voice-keyboard. - Obtainium will install Voice Keyboard and notify you when new releases are published.
- The keyboard is not in the list — tap Enable keyboard in the app; it opens the system screen where "Voice Keyboard" has to be switched on.
- I can't type my API key — while Voice Keyboard is the active keyboard its panel has no letter keys. The settings screen says so and offers Switch keyboard; long-pressing the space bar on the keyboard does the same.
- "Microphone permission required" — tap the mic again and the system prompt appears. After "Don't ask again" the app opens its settings page instead; allow the microphone there.
- Apply says "Not found" — the provider's own message in brackets tells whether the address or the model name is wrong. A retired model looks the same as a wrong URL without it.
- A red counter under backspace — recordings that could not be transcribed yet. Ones waiting for internet resend themselves; tap to resend after fixing a key; hold twice to delete all of them.
- Text arrives without a space, or with a stray one — spacing follows the character next to the cursor; a field that hides its text from keyboards falls back to the configured trailing space.
No analytics, no telemetry, no advertising. Audio is sent only to the transcription provider you configure, using your own API key. See PRIVACY.md for the full policy.
Before first use of the microphone, the app shows a one-time disclosure explaining what is recorded, where it is sent, and what is not collected:
git clone https://github.com/rustemar/voice-keyboard.git
cd voice-keyboard
./gradlew assembleDebug