All英語辞書 is a free English-Japanese dictionary application available on Android. It offers an extensive collection of dictionaries, including English-Japanese and Japanese-English dictionaries from popular sources such as ALC, goo, kotobank, Weblio, jisho, and tangorin. Moreover, it also provides access to English-English dictionaries from Oxford, Longman, Merriam-Webster, Cobuild, and many more.

The app's user interface is simple and easy to navigate, with a search bar at the top of the screen and the option to switch between dictionaries. It also offers voice search, allowing users to search for words using voice commands. All英語辞書 is an excellent tool for anyone looking to improve their English or Japanese language skills, whether they are a student, teacher, or language enthusiast.