Free to start. Pro when you're serious.
The Quant 25 and the mental math trainer are free forever, no card. Cancel Pro anytime.
Free
$0/ forever
No account needed
Start free
- Quant 25: 25 curated problems
- Full mental math trainer
- A daily market making session
- Core concept notes
- Progress, streak & solved tracking
- The full 1,124-problem bank
- 17 firm-tagged sets
- The full syllabus
- Spaced repetition & dashboards
Best value
Pro Annual
$8/ mo · billed $96/yr
Two months off vs. monthly
- Everything in Free, plus:
- The full 1,124-problem bank
- All 17 firm-tagged sets
- Unlimited market making + full P&L history
- Spaced repetition, review forecast & name-the-move
- Advanced notes: Itô, SDEs, Black-Scholes, measure
- Calibration + mastery dashboards
- Unlimited custom playlists
Pro Monthly
$12/ mo
Flexible, month to month
- Everything in Free, plus:
- The full 1,124-problem bank
- All 17 firm-tagged sets
- Unlimited market making + full P&L history
- Spaced repetition, review forecast & name-the-move
- Advanced notes: Itô, SDEs, Black-Scholes, measure
- Calibration + mastery dashboards
- Unlimited custom playlists
7-day free trial. Cancel anytime. Secure checkout via Stripe.
Questions
Is the free tier really free?
Yes. The Quant 25, the mental math trainer, a daily market making session, and the core notes. No account, no card.
Can I cancel anytime?
Anytime, self-serve. Pro stays active until the end of the period you paid for.
What does Pro add over Free?
The full 1,124-problem bank, every firm set, unlimited market making, spaced repetition, the advanced notes, and the dashboards.
How does billing work?
Stripe handles payment, so your card never touches this site. Annual saves you two months.