VoiceTra is a speech translation app that translates your speech into different languages.
VoiceTra supports 31 languages and can be downloaded and used for free. With an easy-to-use interface, you can also check if the translation results are correct.
VoiceTra, whether to enhance your travel experience or to welcome visitors to Japan, will definitely come in handy as your personal speech translator.

VoiceTra utilizes high-precision speech recognition, translation, and speech synthesis technologies developed by the National Institute of Information and Communications Technology (NICT). It translates your spoken words into different languages and outputs the results in a synthesized voice.
The translation direction can be instantly switched; 2 people that speak different languages can communicate using a single device.
Text input is available for languages that do not support speech input.

VoiceTra is best suited for travel-related conversations and is recommended for situations and places such as below:
・Transportation: Bus, train, rent-a-car, taxi, airport, transit
・Shopping: Restaurant, shopping, payment
・Hotel: Check-in, check out, cancellation
・Sightseeing: Overseas travel, serving and supporting foreign customers
*VoiceTra has also been introduced as a disaster-prevention, disaster-related app.

While VoiceTra can be used as a dictionary to look up words, it is recommended to input sentences as it interprets the meaning from the context to output the translation results.

Supported languages:
Japanese, English, Mandarin, Korean, Arabic, Italian, Indonesian, Urdu, Dutch, Khmer, Sinhala, Spanish, Thai, Taiwanese Mandarin, Danish, German, Turkish, Nepali, Hungarian, Hindi, Filipino, French, Vietnamese, Polish, Portuguese, Brazilian Portuguese, Malay, Myanmar, Mongolian, Lao, Russian

Restrictions, etc.:
Internet connection is required.
It may take a while to display the translation results depending on the network connectivity.
Languages available for text input are those that the OS keyboard supports.
The characters may not be displayed properly if the appropriate font is not installed on your device.

Please note that some of the functions or the application itself may be disabled when the server is down.
Users are responsible for the communication fees incurred to use the application. Please be aware that international data roaming charges can be expensive.
The recorded data will be utilized to make improvements in speech translation technologies.

What's New

Version 6.1

・Speech recognition and synthesis for Chinese (Traditional) have been supported.
・Yamaha Corporation's "OMOTENASHI GUIDE" app can now be activated via VoiceTra.

Ratings and Reviews

4.6 out of 5

31 Ratings

31 Ratings

It doesn’t work:-(


It keeps saying “the voice recognition failed.”

Very Very Good

Nay Lin Htike

Very nice အရမ်းကောင်းပါတယ် အောင်မြင်ပါစေ

Very few availability


I installed the app in English version I guess. I am in the US. Then there are very few availability. I wish I can use this with more languages. Especially I am surprised that I don't have an option for Spanish and also no audio for French.


15.2 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Japanese, Korean, Simplified Chinese, Thai, Traditional Chinese, Vietnamese
Age Rating
Rated 4+
© 2010-2018 NICT


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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