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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 |
|---|---|---|---|---|---|
| Welmi | Matched app installs to ad campaigns at launch, at about US$0.04 per install, until the move to Adapty Attribution. mobile attribution | since 2025, until 2025, replaced by Adapty Attribution | about US$0.04 per install, according to the co-founder | C | Adapty case study, published 22 December 2025, updated 21 July 2026: How Welmi.ai scaled from $60K to $200K MRR in 3 months with Adapty Attribution |
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.
Other tools for the same job
Measuring, with the number of stories that use each.