The Ap Geiriaduron is a versatile dictionary application designed for users seeking to explore the Welsh-English Cysgair general dictionary and various standardized terminology dictionaries. Key features include access to Y Termiadur Addysg, which provides standardized terminology for school-age education, and Geiriadur Termau’r Coleg Cymraeg, focused on higher education subjects. Users can also access additional dictionaries through the Porth Termau terminology portal when online.

The app allows for easy searching of English or Welsh headwords, displays all entries for a specified headword, and includes a drill-down feature for related entries. It offers a user-friendly interface available in both Welsh and English, with options to switch languages in the settings. This app is beneficial for students and educators looking to enhance their understanding of terminology in both languages.