You can enable Touch ID for App Purchases on iPhone, which allows you to make purchases from the App Store using Touch ID, instead of using Password.
Using Touch ID for iTunes & App Store Purchases
Apart from ease of use, Enabling Touch ID for App Purchases provides better protection, as it totally rules out the possibility of anyone making In-App purchases while using Apps and playing games on your device.
If you are already using Touch ID, enabling Touch ID for iTunes & App Store purchases is just a matter of enabling this option in Touch ID & Passcode settings on your device.
If you are not using Touch ID, you will be required to follow the on-screen instructions to setup Touch ID.
1. Steps to Enable Touch ID For App Purchases
Enabling Touch ID for App Store purchases is an easy process.
1. Open Settings > scroll down and tap on Touch ID & Passcode.
2. When prompted, enter your Passcode. On the next screen, move the toggle next to iTunes & App Store to ON position.
3. If you are already using Touch ID, you will be prompted, enter your Apple ID password to confirm. If you are not using Touch ID, follow the instructions to Setup Touch ID.
2. Disable Touch ID for App Purchases
At any time, you can disable Touch ID for App Purchases on App Store & iTunes by following the steps below.
1. Open Settings > scroll down and tap on Touch ID & Passcode.
2. When prompted, enter your Passcode. On the next screen, move the toggle next to iTunes & App Store to OFF position.
After this, you will be required to enter your Apple ID and Password for making purchases on App Store and iTunes.
