Frequently Asked Questions
Everything you didn't know you needed to know about arithmetic pricing.
Why is Apple Sign In locked?
Apple requires an active Apple Developer Program membership to enable Sign in with Apple. That membership costs $99 per year — coincidentally the same price as an Accumulatr Founder purchase. Rather than absorb that cost or raise our prices, we've made it a community unlock. One Founder purchase per calendar year funds Apple Sign In for all Accumulatr users. If the threshold isn't met by December 31st, Apple Sign In remains locked and the counter resets. We think this is fair. We're proud of it.Progress this year: 0 of 1 Founder purchasesResets January 1st. Current status: Locked.
Can I try Accumulatr before subscribing?
Yes. All new accounts receive a free 7-day trial with access to all Pro features including the digit 0, subtraction, and multiplication. No credit card required. The trial is available once per account.
Why is the digit 0 a paid feature?
Zero is computationally significant in ways our Free infrastructure isn't designed to handle. It affects placeholder logic, decimal positioning, and result rendering at a level that requires Pro-tier support.
Why does division have a fair use policy?
Division is resource-intensive. Accounts exceeding 1,000 division operations per month may experience rate limiting. Contact Sales for high-volume arithmetic needs.
Why does the Scientific add-on require Ultra?
The Scientific add-on reflects the infrastructure investment required to support trigonometric and exponential operations at the individual level. At $2.99/mo on top of Ultra, we're proud of where we've landed.
What happens to my credits if I upgrade?
Credits remain in your account and can be used for any pay-per-use operations outside your plan scope.
Is the % button coming?
We're actively evaluating percentage as a feature category. Join the waitlist.
Why did you lower your prices?
We listened. Accumulatr's mission has always been to make arithmetic accessible, and our previous pricing didn't reflect that.
Why is the Founder tier $99?
A TI-84 costs $99. We felt that was the right reference point for a one-time calculator purchase. We also felt it was fair. We're proud of this one.