This is the best English to Vietnamese dictionary and the most complete reference work available for Android devices.

Dictionary

OnScreen Dict is a powerful tool for learning the Vietnamese language. You can tap any word in a document to get its meaning. It is also suitable for reading news, emails, and other documents. It works offline, which means you do not need to connect to the Internet to use it.

Vocabulary

OnScreen Dict is also a vocabulary learning tool. The app contains vocabulary packs, which are divided into topics. Each pack contains words with their meaning, pronunciation, and example sentences.