Apple App Store
App Store auto-updates can be enabled or disabled on the iPhone, iPad or iPod touch. When switched on, the iOS device will automatically download and install the latest app updates for the software on your device when they are released.
Some users prefer to keep automatic app updating off, because there can be bugs or undesirable features in an app update. Usually these are resolved quickly by developers, however if you prefer to review available updates then automatic downloads may not be your cup of tea.
To set apps to update automatically:
Sometimes you need to make sure the people using your iPhone aren't running up the App Store bill. The option to switch off in-app purchases altogether is handy, especially if young children regularly use your iOS device. To lock in-app purchasing follow these steps:
In iOS 11 or earlier
1. Navigate to Settings -> General -> Restrictions -> Enable Restrictions
2. Enter a passcode for Restrictions. You will be asked to enter it twice.
3. Scroll down to the Allowed Content section.
4. Select In-App Purchases -> OFF.
iPhone and iPad owners can now view available pre-order titles in the Game section of the Apple App Store. Currently there are only a handful of titles available, including the music rhythm title, Cytus II, Thumper: Pocket Edition, Full of Sparks, JYDGE, Slime Pizza, and Lord of Dice.