Multilingual Speech Translation Application

Communicate with the world using "VoiceTra"!

with the world
using "VoiceTra"!

Download on the App Store

Get on Google play

* Data communication via the Internet is required to use the app and users are responsible for the fees incurred.

VoiceTra movie
Play to learn about "VoiceTra"

What's new

Sep. 26, 2016
Due to maintenance, the servers will be temporarily stopped during the following period:
Thursday, September 29th, 10AM-11AM (JST) UTC+9:00 (for approx. 30 min.)

The app will be out of service during the above period.
We apologize for the inconvenience this may cause and thank you for your understanding.
Sep. 12, 2016
Aug. 29 The following updates have been made to the server:
- Added names of IC transport cards, trains, railway lines, music genres,Pokemon characters, etc.
- Improved Chinese and Korean speech recognition accuracies.
Sep. 8, 2016
VoiceTra will be introduced on NHK WORLD "NHK NEWSLINE".
- Broadcast on the hour on Thursday, September 15th "NHK NEWSLINE"
See below for more information on how to watch the program:
*You may experience problems using VoiceTra right after the broadcast due to network congestion. In this case, please wait for a while and try again later.
Jul. 13, 2016
VoiceTra ver.5.3.2 for iOS and Android has been released.
- Now supports speech synthesis and recognition for Brazilian Portuguese.
Jun. 1, 2016
VoiceTra ver.5.3.1 for iOS and Android has been released.
- Some of the languages that were available as trial versions have been officially supported.

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What's VoiceTra…

Using VoiceTra

VoiceTra is a speech translation app that translates your speech into different languages. With an easy-to-use interface, you can also check whether the translation is correct.

VoiceTra translates between 31 languages *.

*Includes dialects of Chinese and Portuguese.

Download and use for free.**

**Data communication via the Internet is required to use the app and users are responsible for the fees incurred.

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Supported models and OS versions


Models: iPhone 4 or later, iPad 2 or later, iPod touch (5G) or later
OS: iOS 7.0 or later


OS: 4.1 or later
*Compatibility is not guaranteed for all models of Android.


This application utilizes speech recognition, machine translation, and speech synthesis technologies developed by the National Institute of Information and Communications Technology (NICT). Users who wish to use the technologies for commercial purposes, etc. are requested to contact NICT.