Control Center on iPhone gives you instant access to useful control and your favorite apps. For example, you can quickly turn on or off Cellular, Wi-fi, screen rotation, torch from iPhone Control Center.
How to access Control Center on iPhone?
On an iPhone X or later, swipe down from the top-right corner of your screen to pull down the Control Center. On an iPhone SE (2nd generation), iPhone 8 or earlier, swipe up from the bottom edge of any screen to bring up the Control Center.
How to add apps or utilities to iPhone Control Center?
Go to Settings > Control Center > Customize Controls. Existing apps or icons will be listed in the Include section. Scroll down to the More Controls at the lower section to find and add more apps, icons, shortcuts or controls to the iPhone Control Center.
Simply tap the Add button to add an app or utility to the Control Center. Press and hold the three gray lines next to the controls to rearrange them in the order. Note that currently only system apps, utilities can be added to the Control Center. You can’t add a third-party app to iPhone Control Center.