Rozum Case Study
AI Language Learning
Vocabulary that sticks, with spaced repetition and an AI tutor you practise speaking to.
Education
iOS and Android
Global
Client type
Education studio
Delivered
iOS, Android, speaking tutor
Headline result
10K+ installs
The Challenge
Learners could recognise a thousand words and still freeze in a conversation.
The client had a strong word learning method but their users kept reporting the same gap. They could pass a review session comfortably and then fail to say a single sentence out loud to a real person.
Speaking practice usually means booking a tutor, which is expensive and intimidating for a beginner. The brief was to make the low stakes version: somewhere nobody is judging you and it does not matter how often you stumble.
The Solution
Review
Words come back exactly when you are about to forget them
Each word has its own schedule based on how easily you recalled it. Sessions stay short, and the app is honest when a word needs to be seen again rather than quietly moving you on.
Speaking
A tutor that lets you stumble in private
You hold a short spoken conversation using the words you have learned. The tutor keeps the vocabulary within reach, corrects gently, and never moves faster than you can answer.
Habit
A streak that survives a bad week
Missing a day does not wipe your progress. The app protects the streak once a week, because the users who quit are the ones who lost a fifty day run to a single busy Tuesday.
A signature detail
Making a speaking tutor forgiving on purpose
The first version corrected every error immediately and testers hated it, because being interrupted mid sentence is exactly what they were afraid of in real life. We changed the tutor to let a sentence finish, then offer one correction, the one that matters most. Session length in testing roughly doubled after that single change.
- 1 Words learned Spaced repetition sets the vocabulary in reach.
- 2 Conversation opens Tutor uses only words you have met.
- 3 Sentence finishes No interruption, however rough it sounds.
- 4 One correction The single most useful fix, then carry on.
The Result
10K+
installs across both stores.
2x
longer speaking sessions after the correction change.
The screens
Download Rozum
Live on the stores now. See the work for yourself.
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