Pricing
Last updated: September 3, 2026
One subscription, everything included, with a 7-day free trial. Founder's Math is an iPhone app in final polish: checkout opens at launch. Join the waitlist and we email you when it does, at the founder's price below.
Monthly
$4.99 a month for waitlist members
Annual
$59.88 a year for waitlist members
The founder's price is locked for good. Join the waitlist before launch and you keep $4.99 a month or $59.88 a year for as long as your subscription stays active, even after the regular price applies to everyone else.
What you get
- Over 40 techniques, from percentages to two-digit multiplication and estimation
- Unlimited practice sessions, five minutes at a time
- Progress, streaks and leagues that track what you actually remember
- Heron, the coach who walks you through the method
- Every technique we ship next, at no extra cost
Free trial
Every plan starts with 7 days free, and every session works on real techniques. You enter payment details when the trial begins, nothing is charged during those 7 days, and we email a reminder before the first payment. On day 8 we bill the plan you chose. Cancel at any point inside the trial and no charge is made at all.
How billing works
Subscriptions renew automatically at the end of each period until you cancel. Prices are in US dollars and are the same in every country; any local sales tax or VAT is calculated at checkout and shown before you pay. We accept cards, PayPal, Apple Pay and Google Pay, depending on your country.
Our order process is conducted by our online reseller Paddle.com. Paddle.com is the Merchant of Record for all our orders, which means it takes the payment, issues the receipt and handles sales tax, and the charge on your statement reads Paddle.
Buying inside the iPhone app
You can also subscribe from inside the app. Apple then processes the payment and manages the subscription, under Apple's own terms, and prices there follow Apple's own price points, so they can differ from the ones above. A subscription bought in the App Store is cancelled in Settings on your device, and only Apple can refund it. Subscriptions do not transfer between the website and the App Store, so pick one place and stay there.
Cancelling and refunds
Cancel at any time through the Manage subscription link in any receipt Paddle sends you, or by writing to us. Access continues to the end of the period you already paid for, and within 14 days of a charge we refund it in full. Our refund policy explains when we return money and how long it takes.
Questions about a plan
Write through the contact page or straight to hello@foundersmath.app. If you are still deciding, the about page explains what the app teaches and who it is for.
Founder's Math is a trading name of Valentin Tomilin, an individual entrepreneur registered in the Republic of Armenia, tax identification number 20317045, Teryan Street 68, apt. 3, Yerevan 0009, Armenia. Full details are in the terms of service.