Open the App Store
Tap your profile icon in the top-right
Scroll to Available Updates
Tap Update next to an app, or tap Update All
Enter Face ID/Touch ID/Apple ID password if prompted
Keep your iPhone connected to Wi‑Fi and power while updating
To enable automatic updates:
Go to Settings
Tap App Store
Turn on App Updates
To update using Cellular data (if needed):
Go to Settings
Tap Cellular
Scroll to App Store
Turn on Cellular Data (or enable Cellular Data for App Store)