RTranslator
Free offline real-time speech translation app for Android phones.
Free alternative to Google Translate
Screenshot from the project’s own README · tap to enlarge
RTranslator runs speech recognition and machine translation models directly on your Android phone without an internet connection. It lets you have face-to-face spoken conversations using Bluetooth headsets or a walkie-talkie mode on a single phone. Because all AI runs locally, no servers or third-party accounts are used.
✓ Good for
Travelers and speakers needing private, offline voice translation on Android.✕ Skip it if
Skip if you use iOS or have a phone under 6GB RAM.How to start
- Download and install the APK from GitHub releases.
- Open the app to download required AI models.
- Select your mode and start speaking to translate.
Requires an Android phone with at least 6GB RAM and a fast CPU.
Not sure how to install, or if it’s safe? Read the beginner guide
FAQ
Is RTranslator free?
Yes, RTranslator is completely free and open source under the Apache-2.0 license, requiring no API keys or paid subscriptions.
Is RTranslator safe to download?
It is open source (Apache-2.0 license) with 10,652 GitHub stars, last updated 2026-11-07. Download only from the official link on this page, and scan the file before installing: see the safety checklist in our beginner guide.
Does RTranslator work offline?
Yes, it runs speech recognition and translation models entirely on your phone, requiring no internet connection after downloading the initial models.
Compiled from the project README. 10,652 GitHub stars (2026-11-13) · License Apache-2.0 · Last update 2026-11-07