Use Guided Access on iPhone
Guided Access helps you stay focused on a task by temporarily restricting iPhone to a single app, and allowing you to control which app features are available. You can do any of the following:
Disable areas of the screen that aren’t relevant to a task, or areas where an accidental gesture might cause a distraction
Disable the iPhone hardware buttons
Limit how long someone can use the app
Set up Guided Access
Go to Settings > General > Accessibility > Guided Access, then turn on Guided Access.
Tap Passcode Settings, tap Set Guided Access Passcode, then enter a passcode.
You can also turn on Face ID (iPhone X and later) or Touch ID (other models) as a way to end a Guided Access session.
Do any of the following:
Tap Time Limits to set a sound or have the remaining Guided Access time spoken before the time ends.
Set whether other accessibility shortcuts are available during a session.
Start a Guided Access session
Open the app you want to use.
Turn on Guided Access using one of the following methods:
Circle any areas of the screen you want to disable. Drag the mask into position or use the handles to adjust its size.
Tap Options, then turn on or off any of the following:
Motion (to prevent iPhone from switching from portrait to landscape or from responding to other motions)
End the Guided Access session
iPhone X and later: Double-click the side button, then unlock with Face ID (if enabled). Or triple-click the side button, then enter the Guided Access passcode.
Other models: Double-click the Home button, then unlock with Touch ID (if enabled). Or triple-click the Home button, then enter the Guided Access passcode.