Learn new languages by reading books. Tap any word for instant translation, save new vocabulary, and practice with interactive exercises. Supports offline reading and a wide range of languages.





10+ similar apps compared and reviewed
Looking for something like Calleo? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.















Learn new languages by reading books. Tap any word for instant translation, save new vocabulary, and practice with interactive exercises. Supports offline reading and a wide range of languages.




Sharpen your design eye with daily interactive challenges that test your UX/UI skills. Learn to identify usability issues, compare interface solutions, and understand design principles with instant feedback. Ideal for aspiring designers seeking practical experience.


Learn languages by immersing yourself in real-world content like YouTube videos. This app focuses on understanding native speakers and building practical vocabulary through interactive subtitles and personalized review tools.




This app uses AI to create personalized flashcards from movies, videos, books, and songs. It employs spaced repetition and smart tracking to help you build long-term vocabulary memory. Supports 51 languages for diverse learners.


This app helps language learners master vocabulary through digital flashcards. It offers AI-powered deck generation, pronunciation support, and personalized review of forgotten words. Users can choose between self-paced learning or scored examinations.

