Open the App Store on your iPhone or iPad
Search for the app you want
Tap the app from the search results
Tap Get or the price button
Authenticate with Face ID, Touch ID, or your Apple ID password
Wait for the app to download and install
Open the app from the Home Screen or App Library
Update apps by opening the App Store, tapping your profile, and selecting Update All or updating individual apps
Re-download previously purchased apps by opening the App Store, tapping your profile, and checking Purchased
Ensure your device has enough storage and a working internet connection