Voice & Speech

RTranslator

Open-source real-time translation app for Android running locally

Status
Generally available
Last checked
Checked · Oct 12, 2026
License
Open source
Pricing
Free tier · from $0

What it is

RTranslator is an open-source application that provides real-time translation capabilities directly on Android devices without relying on internet connectivity, making it ideal for offline use in various languages.

RTranslator stands out as an open-source solution providing real-time offline translation capabilities directly on Android devices, making it ideal for scenarios where internet connectivity is unreliable or unavailable.

When it fits — and when it doesn’t

A good fit for

  • Users who need a reliable offline translation tool on Android devices

  • Developers looking to integrate real-time translation into their apps without internet dependency

  • Educators and students requiring quick translations in areas with poor connectivity

Look elsewhere if

  • Projects that require cloud-based, always-on services for translation

  • Users who need support for a wider range of languages beyond the currently supported ones

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support compared to online translation services

    RTranslator supports fewer languages offline due to the need for preloaded data.

  2. 02

    Performance degradation on lower-end Android devices

    Translation processes can be resource-intensive, leading to slower performance or battery drain on less powerful hardware.

  3. 03

    Outdated translation models may lead to inaccurate translations

    Offline nature means that translation algorithms and dictionaries are not frequently updated, potentially resulting in outdated or incorrect translations.

  4. 04

    Complex setup for integrating with existing Android projects

    Integration requires manual configuration of the project's build.gradle files and additional dependencies, which can be error-prone.

What it does well

  • Real-time translation capabilities

  • Offline functionality

  • Support for multiple languages

  • Open-source and customizable

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up RTranslator

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →
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RTranslator — tracked on AI Navigator

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