If you're looking for a comprehensive language learning tool that doubles up as a bi-directional dictionary, the English Punjabi Dictionary from NerdCats is a great option. This free Android app offers a wide range of features that make learning English and Punjabi easy and fun.

The app features a mini dictionary that you can use in other apps like pdf readers or browsers, making it quite versatile. You can browse words by category, and there's a vocabulary list with over 50 different categories to help you grow your vocabulary bank. Additionally, the app provides word definitions, examples, synonyms, and pronunciation, which are all useful for language learners.

Other features of the app include a quiz, GRE, and a list of lessons to improve your language skills. You can search for the meaning of words in the list of words, read English stories with the help of the dictionary, and save learned words by clicking the star button. The app also provides daily new words for learning, the biggest collection of words in the dictionary, and the most used words in drama. Lastly, you can browse the internet with the help of this dictionary.

Overall, the English Punjabi Dictionary is an excellent app for anyone looking to learn English and Punjabi. Its comprehensive features and user-friendly interface make it a must-have tool for language learners.