- 180 users. 8 of them engaged deeply. One person hit "review again" 64 times on a single flashcard deck. The other 172 bounced.
- Indian users spend 2x longer than US users (96 sec vs 44 sec). Bengaluru and Ahmedabad are my strongest cities. No idea why.
- Flashcards get 10x the engagement of quizzes. Quiz completions in a month: 1 person. So I made flashcards the default.
- Day 7 retention: 0%. Literally zero. Just shipped spaced repetition reminders — no data yet on whether it helps.
- Revenue: $0.
So the product works for the few who try it. The problem is getting people to try it.
Features: 4 output types (flashcards, quiz, summary, explain-with-examples), PDF upload, TTS audio on every card, spaced repetition, export to PDF/DOCX/JSON, 11 languages. History and streaks stored client-side in IndexedDB — nothing leaves the browser unless you hit generate.
Stack: Next.js, Supabase, Claude Haiku, Vercel. No auth required — rate limiting via IP + fingerprinting.
Would love feedback on UX, output quality, or whether "free forever, no signup" is a viable positioning against VC-funded competitors who are all moving toward paywalls.
thank you!