
A “Duolingo for electronics”: 240+ experiments graded by a live circuit simulator (opens learnee.app in a new tab)
LearnEE, web + iOS · 134 sign-ups in the first 4 weeks
What went into it
- 240+ interactive experiments across 35 worlds and 10 subjects, from Ohm's law to PID control, RF and a CPU wired gate by gate — each graded by an in-browser circuit simulator.
- Launched to 600+ unique visitors, 31K+ tracked events and 134 sign-ups (~22% conversion) in 4 weeks; learners finished 1,700+ lessons and 660+ challenges.
- $6.99/mo Pro tier that unifies Stripe (web) and Apple In-App Purchase (iOS) into one entitlement model — paying subscribers within 30 days.
- XP, streaks, energy, weekly leagues, referrals and an AI tutor on a 19-table Supabase/PostgreSQL schema with row-level security on every table, plus Sign in with Apple.






