Ridmik Dictionary - Offline is the best Bangla-English and English-Bangla dictionary app available for Android. With over 90,000 words, the app is comprehensive and includes various topic-wise sorted words, GRE words, and splash cards. The app also offers daily word notifications, practice options, and a word widget.

Apart from the dictionary feature, the app also offers an interactive map and an English learning system. The grammar lessons are explained in the simplest way, making it easy for users to learn and practice. Furthermore, users can translate any sentence from Bangla to English and English to Bangla with the offline translation feature.

One great feature of the app is that it can be used on browsers and other apps using Android's accessibility feature. Overall, Ridmik Dictionary - Offline is an excellent app for anyone looking to improve their English vocabulary or looking for a comprehensive dictionary app for Bangla-English translations.