“Lock the screen” can mean three different things: turn the display off, keep one app open, or stop touches from changing what is on the display. Decide which result you need before choosing a setting.

For a normal device lock, use the iPhone’s lock button. For staying in one app and disabling touch, use Guided Access. For a simple still display within that session, open Baby Lock Screen for iPhone.

Set up Guided Access

In Settings → Accessibility → Guided Access, enable the feature and configure its passcode settings. Apple also provides options for supported biometric authentication. Use the system’s own instructions for your iOS version.

Source: Apple’s Guided Access setup guide.

Start a session with a simple screen

Open Baby Lock Screen and choose an appearance in Screen settings. You can leave Black selected, or choose White, Warm gray, Muted sage, or Still circles. Set the brightness and fade options before starting.

Start the app’s screen mode. Use the accessibility button shortcut to open Guided Access—typically a triple-click of the side button, or Home button on models that have one. If a shortcut menu appears, select Guided Access. Open the session options, switch Touch off, and start the session.

Check the hardware-button options too. Verify the actual behavior on your phone before use; a black display alone is not evidence that Guided Access started.

Turn off touch inside another app

If your goal is to keep a photo, video, or another app visible, start Guided Access in that app. Baby Lock Screen does not place a touch-blocking layer over other apps and does not keep a video visible under its own black screen.

The setup mechanism does not decide whether the content is appropriate for a particular child. See our separate screen-time guidance for that context.

Practice the exit before you need it

Use Apple’s Guided Access shortcut, authenticate with the configured method, and choose End. The exact shortcut can differ by iOS version and authentication configuration; keep Apple’s current instructions handy.

After Guided Access ends, Baby Lock Screen may still display the selected appearance. Hold two fingers on it for three seconds to return to the app’s controls. The in-app gesture deliberately does nothing while Guided Access is active.

If something does not work

  • The phone can leave the app: confirm that a Guided Access session actually started. Opening the app alone is not enough.
  • Touch still works elsewhere in the session: check the system Touch setting. Ignoring ordinary taps in Baby Lock Screen is separate from disabling touch at the system level.
  • The display becomes black later: the app’s fade timer may have run. It changes the appearance without ending Guided Access.
  • The exit gesture does nothing: end Guided Access first, then try the app’s two-finger hold.

Do not count on a gesture being impossible for a child to discover. Keep the phone supervised and maintain access to its normal system controls.

What the app adds

Guided Access is already built into iPhone. Baby Lock Screen adds a ready-to-use still display, saved preferences, optional dimming, a fade to black, and quick-start shortcuts. Read the feature details or visit support for app-specific help.