While in preview mode, changes to your hooks will reload the development server automatically.
You may need to pull down to refresh the screen in the app to see the changes.The app shows a banner at the top of the screen when in preview mode. The color of the banner changes based on the fetch status for hooks.
grey -> idle/loading
green -> success
red -> error
[!IMPORTANT]
Check the terminal for errors in the development server if you see a red banner, and make sure your phone and computer are on the same network.