Keep your iPhone or iPad screen on

Change Auto-Lock

1. Open Settings.
2. Tap Display & Brightness, then Auto-Lock.
3. Choose a length of time^[1].

Apple notes that delaying or preventing Auto-Lock may increase power consumption^[1]. Choose a long value only for the time you need it.

Auto-Lock is greyed out or stuck at 30 seconds

Low Power Mode sets Auto-Lock to 30 seconds^[2]. Turn Low Power Mode off in Settings > Battery or Control Center, and Auto-Lock becomes adjustable again.

On a work or school device, a management profile can set the maximum Auto-Lock time you are allowed to pick^[3]. In that case only the organisation can change it.

Keep the screen on from Safari

Safari on iOS and iPadOS 16.4 and later supports the Screen Wake Lock API^[4]. Open the keep-awake tool and press Start: the screen stays on while that tab is in front, without changing Auto-Lock. It stops when you switch apps, lock the phone or press Stop. If Low Power Mode is on, the browser may refuse the request.

Using an iPhone or iPad as a mouse jiggler

The phone jiggler runs in Safari and keeps the screen on while the pattern moves. iPhone Safari may not offer true full screen for web pages; the pattern then fills the browser window. Remember the difference: keeping your phone awake does nothing for the computer unless the mouse actually reads the pattern. If it does not, see mouse jiggler not working.