How Your App Runs
Every AppX project runs in its own hosted environment. It's what powers your live preview, in the browser and on your phone, and holds your project's files. AppX manages all of it — you never touch servers or config.
Ready when you open it
When you open a project, its environment starts and serves the preview. Edits are applied to the running app, so the QR code under Open on phone always leads to your latest work.
Sleeping to stay efficient
If a project sits idle for a while, its environment goes to sleep. Nothing is lost — your files, screens, and settings are all saved. The next time you open the project or scan the QR code, it wakes back up on its own.
This is the same on every plan.
Your files are safe
Your project files persist through sleeps, wake-ups, and restarts — they're stored durably, not just in the running environment. The code AppX generates is yours, always there when you come back.
For data your app needs to remember between sessions (a user's saved items, settings, etc.), store it in the app itself — for example with AsyncStorage — rather than relying on the preview environment.
If something looks stuck
Occasionally a preview can get into a weird state — a blank screen, or an edit that doesn't seem to show up. The quickest fixes:
- Reopen the project so the environment wakes fresh.
- Re-scan the QR code with your phone.
- Make one more small edit in chat to trigger a fresh push.
If it still misbehaves, reach out to support.