Building the product · 6 of 110 stories

Swift

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	Grade	Source
Wave AI	Programming language of the iPhone app.	B	Adapty case study: Wave AI, growing an indie app from $0 to $4M ARR with Adapty (published 29 July 2024, later changed; archived 10 November 2024)
BoltAI	Programming language of the native Mac app.	C	Daniel Nguyen's newsletter, 29 September 2024: Sep 2024: Interview on Indie Hackers
Boothie	Programming language of the app, as the founder lists it on the TrustMRR profile.	C	TrustMRR profile of Boothie, revenue read from RevenueCat by API key
fastwrite.io	Listed by the founders as the frontend language.	C	TrustMRR: fastwrite.io, Stripe-verified profile, synced 13 October 2026
GlowUp	Listed as GlowUp's language on the founder's website; no source says when, or whether it replaced FlutterFlow.	C	Louis-David Paul-Hus's website: home page and Digital Products page
Brawler	Programming language of the iPhone app, according to the founder's TrustMRR profile.	C	TrustMRR profile of Brawler, revenue synced 16 October 2026

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.

OpenAI API5 Apple App Store4 Anthropic API3 Google Gemini API3 Next.js3 Stripe3 Firebase3 Vercel3 RevenueCat3 TikTok3

Other tools for the same job

Building the product, with the number of stories that use each.

Next.js60 Cursor21 React18 ChatGPT14 Claude Code14 GitHub13 TypeScript13 Python12 Tailwind CSS12 Node.js11 Figma10 Bubble9

Back to all tools