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Three steps, zero friction.
Select the technologies for your next interview. React, Node, PostgreSQL, Kubernetes — we've got you covered.
Targeted cards, replayed at the right interval. Like Anki for devs — concepts stick for the long run, not just the night before.
Honestly rate each answer from 0 to 3. The system identifies your gaps and revisits them at the right time.
Spaced repetition locks concepts into long-term memory. After 3 sessions on React 19, hooks come naturally — even at 11pm the night before your interview.
75 stacks available — more added regularly.
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Yes, you can try directly via Quick Start mode (10 questions, no account needed). Free plan: 3 stacks max, 1 session/month, 10 questions, no history. Mission (€9, 7 days) unlocks unlimited sessions, all stacks, and 1 month of history. Monthly (€19/month, coming soon) adds 12 months of history.
No, you can start right away — no sign-up needed.
Yes, each stack is precisely versioned (e.g. Java 8, Java 11, React 18, React 19). Questions are scoped to the version you select — not just the latest LTS.
6241 questions ready for your revision.
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