I phone apps not work

Try and force restart your iPhone to see if the problem persists

1. Press and quickly release the volume up button.
2. Press and quickly release the volume down button.
3. Press and hold the side button.
4. When the Apple logo appears, release the side button.

If you have problems downloading apps on your iPhone please see this link for further reference

If you can’t download or update apps on your iPhone or iPad - Apple Support