All in one Dictionary is an Android app by Vietbill that combines four dictionaries in one, making it a comprehensive tool for language learning. The app includes the Cambridge and Oxford dictionaries, Google images, and the Thesaurus dictionary for synonyms. With the ability to search across all four dictionaries simultaneously, users can easily find the definitions, synonyms, and images they need to fully understand a word's meaning and context.

The app's user interface is clean and straightforward, making it easy to navigate and search for words. The search function is fast and responsive, and the app offers a history feature that allows users to quickly access their previously searched words. Additionally, the app offers a pronunciation feature that allows users to hear the correct pronunciation of a word.

Overall, All in one Dictionary is a useful tool for language learners, teachers, and anyone who needs quick access to multiple dictionaries in one app. With its user-friendly interface and comprehensive search capabilities, this app is a must-have for anyone looking to improve their language skills.