You can add brushes to Procreate by downloading .brush files onto your iPad, and then "sharing" them to Procreate.

Sideload apps: Follow developer instructions to add to your phone. Not common. Risky: Jailbreak an iOS device and load apps to it. This article explains how to get apps that are not in the App Store ...

Cloud Keychain saves a user's passwords, credit card information, and other sensitive data and syncs it across Apple devices.