RTranslator
An open-source, local, real-time translation app for Android supporting Bluetooth conversation modes.
Run offline speech recognition and translation directly on your mobile device for absolute privacy.
RTranslator is an open-source Android app that provides real-time, offline translation using advanced AI models running directly on your phone. It suits mobile users, travelers, and professionals needing secure, multi-party conversations without cloud reliance.
What it is
The application captures audio via phone microphones or Bluetooth headsets, transcribes it using speech recognition, translates it through models like Mozilla Bergamot or Madlad, and reproduces it via text-to-speech. It supports multiple modes including a multi-phone Conversation mode, a single-phone WalkieTalkie mode, and standard Text translation.
Who it's for
It suits Android users seeking complete privacy and offline translation capabilities with at least 6GB of RAM. It does not suit users with low-end devices lacking sufficient memory or those needing iOS support.
Key features
Local Speech Recognition
Processes audio directly on your device using Whisper for absolute offline privacy.
Multi-Phone Conversation
Connects multiple devices over Bluetooth LE to translate live multi-party discussions.
WalkieTalkie Mode
Listens simultaneously in two languages on a single phone for quick interactions.
Background Operation
Continues translating while running in the background or when your phone is on standby.
Up and running in 3 steps
Our honest verdict
What's great
- Runs entirely offline without sending data to external servers
- Supports Bluetooth headsets for hands-free conversations
- Offers multiple specialized translation and conversation modes
- Includes low-quality language packs for expanded linguistic support
Where it falls short
- Requires a relatively powerful phone with at least 6GB of RAM to prevent crashes
- Initial startup requires downloading large AI model files of around 1.2GB
- Background power-saving limits on some phones may require keeping the screen on
Pricing & license
Free under its license, with the only hardware cost being the requirement for a capable modern Android smartphone.
Open remote AI-training roles
874 open remote AI-training roles, updated November 15, 2026; most pay $20–$170 an hour. Zekai lists them free; the application goes to the employer’s platform.
Alternatives
These reviewed AI tools do the same job instantly — from our scored directory.
Use it, or have us set it up
FAQ
Does RTranslator require an internet connection?
No, once the initial AI models are downloaded, the app runs entirely offline.
What are the hardware requirements?
You need an Android phone with at least 6GB of RAM and a fast enough CPU for smooth execution.
