Pricing
Invest in skills that compound.
Free accounts get the first 4 lessons per course plus practice. Pro unlocks the full curriculum, exams, and guided Python projects. Try Pro free for 3 days — cancel before then and you won't be charged.
Pro · $20/mo annual
Everything unlocks.
Full course library, exams, and Python projects. New releases stay included.
$240 billed once a year · free for the first 3 days
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No charge today · Cancel anytime from the dashboard
- Full courses: Precalculus through Calculus III
- All lessons, quizzes, and course exams
- In-browser Python coding exercises
- Guided Python projects (growing library)
- Practice drills + weekly leaderboard
- Interactive graphs & visualizations
- Progress dashboard that tracks what you’ve finished
- New courses and projects included as they ship
Secure checkout · Cancel anytime · All payments are final
FAQ
Frequently asked questions
What’s free without Pro?+
Signed-in free accounts get the first 4 lessons in each course, plus practice problems and the weekly leaderboard. Course exams and Python projects stay Pro-only.
How does the 3-day free trial work?+
You get full Pro access for 3 days. You won't be charged until the trial ends. Cancel before then and you pay nothing.
Can I cancel anytime?+
Yes. Pro is month-to-month (or annual) and you can cancel in the Stripe customer portal. You keep access until the end of your billing period (or until the trial ends if you cancel during the trial).
Do I need to be good at math already?+
No. Courses start from the fundamentals and build up, so you can jump in at whatever level you're at.
What's your refund policy?+
All payments are final. We don't offer refunds after a charge goes through. That's why we give you a 3-day free trial: try everything first, then decide. Read Refunds & trial.
Which courses are included today?+
Precalculus, Calculus I, Calculus II, and Calculus III, plus guided Python projects. Additional courses may be added later and stay included in Pro when they ship.
Do I get new courses as they launch?+
Yes. Pro members get new courses and projects we ship, with no extra charge.
Is there a referral program?+
Yes. Share your link from the dashboard. Friends who subscribe monthly get their first month at $20. For every 2 friends who convert to paid, you get a $25 credit (one free month). Each person and payment card can only qualify once — creating extra accounts with the same card does not work.
Ready to go deeper?
Build durable math skills, the kind that unlock engineering, coding, and quant careers.
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