Translation & language
RTranslator
An offline real-time interpreter on your phone
★ 10k
August 2026
Apache-2.0
Translation & language
What we checked ourselves
Not copied from the project's own blurb. These are things we opened and verified, with the date.
- 23 Aug 2026We checked that the link to the project still resolves.
- 30 Aug 2026We read the project's own documentation and found no sign that development has stopped.
Where this sits among the 26 tools we list in Translation & language
- Works without using a terminal20 of 26
- No API key required20 of 26
- Keeps your data on your own machine12 of 26
- Runs on a phone alone6 of 26
- Commercial use confirmed as allowed22 of 26
Only 1 of the 26 meet all of the conditions above.
Counted from our own checks: every tool we list is examined against the same criteria.
What it does
Walkie-talkie style conversation translation on Android, no internet needed.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals
Before you start
- Setup difficultyEasy to start
- Command lineNot required
- API keyNot required
- Sends data onlineNo
Judged automatically from the project's own metadata. Always confirm on the official page.
RTranslator FAQ
- Is RTranslator free?
- Yes. It runs on your own machine, so there is no usage-based cost either.
- Do I need to install anything or write code to use RTranslator?
- You install it like a normal desktop app. No command line involved.
- Does RTranslator work on a phone?
- Yes, it works on a phone.
- Can RTranslator run offline?
- Yes. Everything happens on your own machine, so your data is never sent to an outside server. That makes it usable for material you cannot share externally.
- Can I use RTranslator commercially?
- The licence is Apache-2.0, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| RTranslator (this page) | Not needed | Not needed | No | Yes | Yes |
| LiveCaptions-Translator | Not needed | Required | Yes | No | Yes |
| MouseTooltipTranslator | Not needed | Not needed | Yes | No | Yes |
| linguist | Not needed | Not needed | Yes | No | Yes |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.