The app offers transliteration into multiple Indian languages as well as a multi-lingual dictionary.
The app is part of the Bharatavani Project (BvP) which is a knowledge initiative of the Ministry of Human Resource Development (MHRD).
The app mirrors one component of the BvP - Shabda Kosha. The website bharatavani.in offers a larger feature-set.
The dictionaries have been crowdsourced from various governmental and non-governmental institutions.