iPhone recording stops when the screen locks — how to fix it

The lock is the trigger, not the cause

The screen lock is simply the moment iOS applies its background rules. If an app is entitled to run background audio and is actively recording, the lock changes nothing — the orange microphone dot stays visible in the status bar and capture continues. If any of the conditions below apply, the lock is when you notice the failure.

Four things that actually stop it

1. The app doesn't do background audio. Many simple memo apps record only while they are on screen. Nothing you change in Settings will fix that; it's a limitation of the app.

2. The app was force-quit. Swiping the app card up in the app switcher ends background audio immediately. Going back to the home screen does not. This distinction catches a lot of people out.

3. Low Power Mode. It throttles background activity to save battery. Turn it off for long sessions, and remember iOS offers to enable it automatically at 20%.

4. Storage ran out. Continuous recording writes constantly. When free space runs out, recording stops and the current file may not finalise cleanly.

The 15-minute test that settles it

1. Restart the iPhone.
2. Open the recorder and start a recording.
3. Lock the screen immediately and put the phone down.
4. Don't take calls, don't open other apps, don't trigger Siri.
5. After 15 minutes, unlock and check the file covers the full span.

If that passes, the lock isn't your problem — retest while switching apps or taking a call, and the failure will show up there instead. If it fails, work down the four causes above, changing one thing at a time so you know which one mattered.

What the orange dot tells you

iOS shows an orange dot in the status bar whenever the microphone is in use. It appears on the lock screen too. Wake the screen mid-test: if the dot is there, capture is live. If it has gone, the session ended — and the time you noticed tells you roughly how long it survived, which is useful evidence for the troubleshooter.

iPad behaves the same way

iPadOS applies the same background-audio model. The one extra factor is Split View and Stage Manager: with several apps active, memory pressure can end a background app sooner on older iPads. If a long session keeps ending on an iPad, run the test with no other apps open.

Menu names vary by device and OS version, so treat the paths below as a guide and search your Settings app if one doesn't match.

Where BlackBox fits

BlackBox is designed to keep recording with the screen off and writes audio into hourly files as it goes, so a locked-screen test is quick to verify and any interruption is easy to see in the timeline. Reliability still depends on the permissions above — a force-quit or a restart stops any app.