Build an App From Your Phone
An app built on the same phone it runs on.
Expo and Claude Code in the cloud, step by step, no laptop
Chapters
- Intro
- What You Need
- The Idea
- Cloud Environment
- Scaffold
- Habits and Saving
- Streaks and a Quiz
- Polish and Review
- Common Mistakes
- Recap
Who it's for
Developers and makers who want to build while away from a laptop, and anyone curious how far a phone-driven cloud coding agent really gets. Beginner to intermediate: you should know what a repo and a pull request are; no React Native experience needed.
By the End You Will
Set up
A cloud environment made for mobile work
Build
An Expo app in five small prompts
Ship
Review, merge and tag each step
Avoid
The four mistakes that stall the build
Recap: before and after
Trusted
- npm install works
- Expo's own servers are blocked
- Lint setup fails: Forbidden
Full
- Expo tooling sets itself up
- Lint and doctor checks pass
- Only for repos you trust
For Expo work, Full made the tools run. Trusted blocked them.
Sources
The real run:
tutorials/expo-app-from-phone-tutorial/run.md(sessions, prompts, timings, failures, PRs).Companion repo: https://github.com/dev-repos/expo-app-from-phone (PRs #1–#5, tags
step-01…step-05).The Claude app's "Create a new environment" page (owner's screenshot, 2026-10-03).
Expo SDK 57, Expo Router,
@react-native-async-storage/async-storage,expo-haptics(versions from the repo's
Coming next in the series: The same app with Codex
