🚀 Become a Beta Tester
Follow these two simple steps to download the Android app and start learning.
Join the Google Group
You must join our testing group to grant your Google account permission to download the beta build.
Opt-in on Google Play
After joining the group, register as an active tester on Google Play and download the application.
Explore the Intelligence Hub
Smart Material Import
Paste webpage URLs, write your own text, upload documents and photos, import a Google Map location, or choose a classic fairy tale. Toppa-AI transforms any of these sources into custom language lessons.
Automated Vocab & Grammar
AI automatically parses your material, building a custom dictionary of key terms and grammar formulas tailored to your proficiency level (A1 to C2).
Interactive Reader
Read articles directly in the app. Tap any word or phrase to see instant translations, readings (furigana), or save them to your vocabulary list.
AI Coach Chat & Feedback
Discuss your study materials with Sakura, your personal AI coach. Receive instant evaluations on grammar accuracy, spelling, and phrasing recommendations.
Sharpen Your Skills with Taboo
Can you explain a word without using the word itself or related terms? Test your expression limits in our Taboo Description Game. Sakura will guess your word while evaluating accuracy, closeness, and phrasing!