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Taking payments · 2 of 110 stories
Superwall
Who uses it, and for what
One row per story. The grade is for the claim that the business uses this tool, not for its revenue.
| Story | What it does there | When | Cost stated | Grade | Source |
|---|---|---|---|---|---|
| Cal AI | Builds the subscription screen (paywall) and runs hundreds of tests on it without new code for each test. | C | Latka interview with Zach Yadegari, May 2025: How Cal AI hit $35M ARR and 20,000 daily downloads in under a year | ||
| Umax | Paywall tool that shows different prices and subscription periods to different users, to test which earns more. | C | Starter Story, 29 December 2024: He made $10M with 3 iPhone apps (video interview with transcript) |
Grade A: the tool's maker or a payment processor confirms the use. Grade B: an independent report, or the tool is visible in public code. Grade C: the founder or the company says so.
Used in the same businesses
Other tools in the stories above, with the number of stories that share both.
Other tools for the same job
Taking payments, with the number of stories that use each.