Classic Leitner.
Free forever. No account. No AI slop.
The original 7-box Leitner method — exactly as Sebastian Leitner described it in 1972 — in a modern app that respects your data and your time.
The 7-box schedule, exactly as it should be
Know a card — it moves up a box. Miss it — straight back to box 1. Each box waits a little longer than the last. 119 days from box 1 to Mastered, if you nail it every time.
Two signals, one brain
Every card asks one honest question: do you know this, or not? No five-button "How confident?" ritual. Two answers. You move on.
Local-first by default
Your cards live on your device. Opt into cloud sync across 3 devices — always free, no account required for local use.
No AI slop
Pro-tier AI card generation is opt-in and off by default. The core review flow is 100% deterministic Leitner — no hidden algorithm "adjusting" your schedule.
Built for momentum
Haptic feedback on every answer. Emotional mascot reactions. Achievements that unlock naturally. Studying that feels like progress.
Strictly better than the competition
The app everyone calls "the Leitner app" moved cloud sync behind a paywall in 2025. We're going the other way.
| Feature | Competitor free | Competitor paid | LeitnerBox free | LeitnerBox Pro |
|---|---|---|---|---|
| Unlimited cards | Yes | Yes | Yes | Yes |
| CSV import / export | Yes | Yes | Yes | Yes |
| Study direction swap | — | Yes | Yes | Yes |
| Images on cards | Degraded | Full | Full | Full |
| 24-state mascot + achievements | — | — | Yes | Yes |
| Haptic + sound feedback | — | — | Yes | Yes |
| Catch-up plan for backlog | — | — | Yes | Yes |
| Global search | — | — | Yes | Yes |
| Cloud sync (3 devices) | — | Yes | Yes | Yes |
| Unlimited devices | — | — | — | Yes |
| AI card generation | Basic | Basic | — | Yes |
| Leech detection + retention analytics | — | — | — | Yes |
| Backup history (30 days) | — | — | — | Yes |
| Works offline | Partial | Partial | Yes | Yes |
| iPad native | — | — | Yes | Yes |
Cloud sync on up to 3 devices is free for every LeitnerBox user, forever.
If we ever change this, every current user keeps it free for life — and we will give six months' notice before any change. Your data belongs to you, and your learning shouldn't depend on a subscription you didn't sign up for.
Get notified when LeitnerBox hits the App Store
First 500 waitlist members get Founder Lifetime access for $19.99 — half the public price, and a five-year feature & price lock.
One email at launch. No drip, no newsletter, no sharing. Unsubscribe removes your address.