VoiceTra is a free speech translation app that supports 31 languages. It utilizes high-precision speech recognition, translation, and speech synthesis technologies developed by the National Institute of Information and Communications Technology (NICT). The translation direction can be instantly switched, allowing two people that speak different languages to 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 such as transportation, shopping, hotel, and sightseeing. However, an internet connection is required, and it may take a while to display the translation results depending on the network connectivity. Users are responsible for the communication fees incurred to use the application, and international data roaming charges can be expensive. The application was developed for research purposes, and the data recorded on the server will be utilized to make improvements in speech translation technologies.

VoiceTra supports Japanese, English, Chinese (simplified), Chinese (traditional), Korean, Thai, French, Indonesian, Vietnamese, Spanish, Myanmar, Arabic, Italian, Ukrainian, Urdu, Dutch, Khmer, Sinhala, Danish, German, Turkish, Nepali, Hungarian, Hindi, Filipino, Polish, Portuguese, Brazilian Portuguese, Malay, Mongolian, Lao, and Russian.

Users are recommended to input sentences as it interprets the meaning from the context to output the translation results. While VoiceTra can be used as a dictionary to look up words, it is not recommended. The characters may not be displayed properly if the appropriate font is not installed on your device. Some of the functions or the application itself may be disabled when the server is down.

Users may test out the app for businesses, etc., but it is recommended to consider using private services that have licensed the technology for continuous use. Please refer to the "Terms of Use" for further details.