The Dungkar Dictionary is an electronic version of the Great Dungkar Tibetan Dictionary.
Words and definitions can be searched for in both english and tibetan, taking advantage of the Tibetan language support built-in to iOS.
If you have our Tibetan Dictionary app installed, you will be able to search the Dungkar Dictionary within that app as well. This requires the Dungkar Dictionary app to be opened at least once after it has been installed.
To type using tibetan script, you need to turn on the tibetan keyboard in the main Settings app:
Settings > General > Keyboard > Keyboards > Add New Keyboard...
You can then select the Tibetan keyboard by tapping the world icon on the keyboard, next to the spacebar.