Discretica Premium

Study discrete math in depth.

Keep the free reference and tools, or go further: all 534 guided practice problems, the complete proof trainer, the mistakes notebook, and advanced progress — all offline in your browser.

OverviewTry the free practiceOpen the calculators

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Unlock everything

  • All 534 practice problems across every topic and difficulty
  • The full proof trainer: fill-the-gap, reorder, and choose-method
  • The mistakes notebook for spaced review of missed problems
  • Advanced per-topic progress — everything works offline in your browser

Premium plans are launching soon. In the meantime, the free tier already covers every topic, all 54 formulas, all six calculators, the basic progress dashboard, the first 60 practice problems, and the first proof exercises.

Start with free practiceTry the proof trainer

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Questions

What stays free?

Every topic and subtopic, all 54 formula references, all six calculators (truth tables, sets, GCD/LCM, base conversion, combinatorics, modular arithmetic), the basic progress dashboard, the first 60 practice problems, and the first proof exercises are free forever — no account needed.

How is my access stored?

Purchases are handled by RevenueCat and Stripe. An anonymous purchase id is kept in this browser so Discretica recognises your Premium access on this device. Keep your receipt email for recovery.

Can I cancel?

Yes. Subscriptions renew automatically and can be cancelled anytime from the link in your receipt email. Lifetime is a one-time payment.