Offline Translator uses Firefox translation models for on-device translation, processing supported text locally on Android.
Open source
24 alternativesRTranslator
RTranslator provides real-time translation on Android through an open source mobile application.
About RTranslator
RTranslator is an Android app for real-time translation that runs locally, described in its repository as almost open source. It offers Conversation mode for connecting with another phone using the app, WalkieTalkie mode for quick turn-based exchanges with one phone, and a classic text translation mode. Conversation mode is the main feature and can connect more than one phone, allowing translation between more than two people; it supports Bluetooth headsets. WalkieTalkie mode only translates between two people, does not support Bluetooth headsets, and requires users to talk in turns.
The repository says translation uses Meta's NLLB and speech recognition uses OpenAI's Whisper; the 3.0 beta replaces NLLB with a choice among Mozilla Bergamot, Madlad 400 3B, and HY-MT 1.5 1.8B models. The app can run offline after setup, but first launch downloads translation and speech recognition models (1.2GB) from GitHub. In some regions GitHub is slow, and the source says models can be downloaded separately and inserted manually. Background operation is supported in Conversation and WalkieTalkie modes, though some phones limit background power.
Key features
- Conversation mode connects two or more phones for bidirectional spoken translation.
- Supports multiple connected phones to translate conversations among more than two people.
- WalkieTalkie mode translates quick, turn-based two-person conversations using one phone.
- Text translation mode provides classic text translation.
- Runs translation and speech recognition models locally for offline use.
- Supports Bluetooth headset capture and playback in Conversation mode.
Best for: Android users who want local, offline real-time translation, especially for in-person conversations with another RTranslator user.
Good for
- Works offline after setup, with translation and speech recognition models running on the phone.
- Provides separate modes for long conversations, quick in-person exchanges, and text translation.
- Open-source repository with APK releases and model files on GitHub.
Watch out for
- First launch downloads 1.2GB of models; GitHub downloads may be slow in some regions.
- Conversation mode requires another person with the app who accepts a connection request.
- WalkieTalkie mode does not support Bluetooth headsets, only translates between two people, and requires turn-taking.
RTranslator at a glance
- Category
- Mobile Apps › Android Apps
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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RTranslator FAQ
Does RTranslator work offline?
The app is described as offline and local, but first launch downloads translation and speech recognition models (1.2GB). If GitHub is slow in your region, the source says models can be downloaded separately and inserted manually.
Can more than two people use Conversation mode?
Yes. Each user can have more than one connected phone, allowing translation between more than two people and in any combination.
What are the limits of WalkieTalkie mode?
It only translates between two people, does not work with Bluetooth headsets, and requires users to talk in turns; it is not simultaneous translation. It can work with only one phone.
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