Questions, answered.
Twenty Miles is an independent app studio in England. We design, build and publish our own mobile apps and take on a small number of client projects each year.
The tech we use.
Boring where it should be boring, so the interesting part is your app. Every tool here runs in production on apps we own.
iPhone and Android
- React Native
- Expo and EAS
- TypeScript
- Push notifications
- Sign in with Apple
React Native with Expo by default: one codebase, both stores, and a working build on your phone early. Native modules where a feature needs them.
Native iPhone
- Swift and SwiftUI
- CloudKit and iCloud sync
- StoreKit
When you specify a native build, or the app leans on Apple-only features like iCloud sync and on-device intelligence.
Backend and web
- Next.js and React
- Firebase
- Vercel
- Node and TypeScript
Admin dashboards, marketing sites, APIs and auth on services we already run in production for our own apps.
Payments and growth
- RevenueCat
- App Store Connect
- TestFlight
- AppLanding
Subscriptions, paywalls and receipts handled properly. Every build goes through TestFlight before the store.
AI
- Claude and Claude Code
- On-device Apple Intelligence
- Speech and vision frameworks
Agents write the first pass of our code and power features like voice habit logging. Engineers review everything that ships.
Working with you
- GitHub
- Figma-free design in code
- Shared analytics dashboard
Source code lives in your GitHub from day one. You see real screens on a real phone, not mockups.
Have an idea worth shipping?
Fifteen minutes, free. Tell us the one thing your app needs to do and we’ll send you a ballpark within a day.