App Store auto login from iPhone

Hi HueraAnn,

Thanks for posting in Apple Support Communities. It sounds like you are being prompted for a password in the App Store. Right? We'd recommend checking your password settings to see which option is selected using the following guidance from Require a password for App Store and iTunes purchases - Apple Support. In short, you will be prompted to sign in with your password or Face ID either every time or after 15 minutes.

"Require a password on your iPhone or iPad

1. Open the Settings app.
2. Tap your name.
3. Tap Media & Purchases.
4. Tap Password Settings, then choose the setting that you want.

If you don't see Password Settings, you have turned on Face ID or Touch ID for App Store and iTunes Purchases. To change this, go back to Settings, tap "Face ID & Passcode" or "Touch ID & Passcode", then turn off Face ID or Touch ID next to iTunes & App Store."

Take care.