Principia
The facts below are what the maker publishes about Principia, checked and dated. Our editors have not written about it yet.
Plans and prices
From Principia's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Explorer | Free | Tiers 1–2 · 15 concepts · guided walkthroughs · live visualizations · progress saved on device · Tiers 3–8 locked · always free |
| Principia Pro | $49.99 a year | 8 tiers · 93 concepts · per year; $4.17/month |
| Principia Pro Monthly | $6.99 a month | All 8 tiers · 93 concepts · guided walkthroughs · printable study aids · future content included · cancel anytime · per month |
| Principia Pro Annual | $49.99 a year | All 8 tiers · 93 concepts · guided walkthroughs · printable study aids · future content included · 7-day free trial · per year · $4.17/month · Save 40% vs monthly |
The facts
Each one read from Principia's own pages, with the date it was checked.
What it does
- Account requirement
- The site says no account is required to start; creating an account enables paid subscribers to sync learning data across devices.checked 11 Oct 2026
- Children’s privacy
- For users under 13, the company says it requires verifiable parental consent and collects the parent or guardian’s email and the child’s learning progress.checked 11 Oct 2026
- Curriculum
- The curriculum has 8 tiers and 93 concepts, from Numbers & Fractions through Calculus II & Proofs.checked 11 Oct 2026
- Guided lessons
- Yeschecked 22 Sep 2026
- Integrations
- The privacy policy names RevenueCat for subscription entitlements and Supabase for cloud storage and progress syncing for paid subscribers.checked 11 Oct 2026
- Intended learners
- The product describes its curriculum as covering 6th grade through college-level mathematics.checked 11 Oct 2026
- Paid from
- 6.99checked 22 Sep 2026
- Privacy
- The company says it does not sell personal information or serve ads, and lists learning progress, account email when provided, and device diagnostics among data it may collect.checked 11 Oct 2026
- Purpose
- Principia teaches mathematics from fractions through college calculus, emphasizing the reasoning behind formulas.checked 11 Oct 2026
- Security
- The privacy policy describes TLS/HTTPS encryption in transit, encryption at rest in its Supabase cloud infrastructure, access controls, and regular security reviews.checked 11 Oct 2026
- Support
- The site lists [email protected] for customer questions and technical assistance.checked 11 Oct 2026
- Teaching features
- Lessons include animated visualizations, step-by-step guided problem walkthroughs, and connections between mathematical topics.checked 11 Oct 2026
Money
- Free plan
- Yeschecked 22 Sep 2026
Where it runs
- Supported platforms
- ios,macoschecked 22 Sep 2026
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