Does the iPhone keep recording when the screen locks?

This is the question people ask right before a two-hour lecture, and the anxiety behind it is reasonable: you cannot check without unlocking, and unlocking mid-session to look is exactly how people accidentally stop things.

What the lock screen actually does

Nothing, to a recorder. iOS lets an app declare that it needs to keep running audio in the background. With that declaration in place, the system keeps the audio session alive when the screen locks, when you switch to another app, and when the phone goes in a pocket. Playback apps use the same mechanism — it is why music does not stop when you lock the phone.

Without that declaration, the app is suspended within seconds of leaving the foreground and the recording ends. This is set at build time, not something you can toggle, which is why a recorder either survives backgrounding or never does. Voice Studio declares background audio, so a recording continues through lock and app switches into the same file.

What genuinely stops a recording

A phone call

This is the big one. An incoming call takes over the microphone — iOS does not let two things own audio input at once. Every recorder gets an interruption notice at that moment, and the recording pauses. What happens next is entirely down to how the app was written: some stop dead and leave you with a half file, some pause and resume when the call ends.

Voice Studio handles the interruption in both directions: the recording pauses when the call begins and resumes into the same file when it ends, so you get one continuous recording with the call missing from the middle rather than two fragments or a truncated file.

Running out of storage

The quiet killer of long sessions. Audio is not huge, but a device sitting at a few hundred megabytes free will fill during a long recording and the write simply fails. Check free space before anything that matters, not after.

The battery dying

Recording with the screen off is cheap, but "cheap" over three hours on a phone that started at 20% is still empty. Long sessions want a cable or a battery pack, and it is worth remembering that Low Power Mode does not stop recording — an empty battery does.

Force-quitting the app

Swiping the app out of the app switcher terminates it immediately. This is the one that catches people who "tidy up" their open apps out of habit while a recording is running in the background. If a recording is in progress, leave the switcher alone.

What does not stop a recording

• Locking the screen, or the display simply timing off.
• Switching to another app to take notes, look something up, or check the time.
• Turning the screen brightness down, or putting the phone face-down on a table.
• Airplane Mode — recording is local and needs no network at all.
• A notification arriving, including a silent one.

That fourth point is worth using deliberately. If you are recording something sensitive and want certainty that nothing is transmitted anywhere by anything, Airplane Mode gives you that guarantee at the level of the device rather than at the level of trusting an app.

Setting up a long session so it survives

• Check free storage first. A rough rule: allow a few tens of megabytes per hour and leave a wide margin.
• Plug in, or start above 60% battery for anything over an hour.
• Turn on Do Not Disturb. It does not prevent a call from interrupting the microphone, but it removes the urge to pick up the phone.
• Start the recording, lock the screen, and put the phone somewhere it will not be picked up. Handling it mid-session is the main cause of accidental stops.
• Do not swipe the app away. Do not "clean up" the app switcher.

One habit worth building for anything irreplaceable: check the elapsed time once, early — a minute or two in — rather than repeatedly. If the counter is moving at minute two, the session is running correctly, and every subsequent check is risk without information.

Why recordings sometimes end up shorter than expected

When a file turns out shorter than the event, the cause is almost never the lock screen. In order of likelihood: a call interrupted it and the app did not resume, the app was force-quit, storage ran out, or the recording was never started — the last one being far more common than people admit, because a tap that misses looks identical to a tap that works if you do not glance at the timer.

That is the argument for the one early check. It costs five seconds and it distinguishes "recording" from "I believed I was recording", which is the difference that matters afterwards.

Common questions

Does the recording stop when I lock my iPhone?

No. An app with background audio permission keeps recording through a screen lock, an app switch and a pocket. Voice Studio declares background audio, so recording continues into the same file.

What happens if I get a call while recording?

The call takes the microphone and the recording pauses. Voice Studio resumes into the same file when the call ends, so you get one recording with the call missing from the middle rather than two pieces.

Can I use other apps while recording?

Yes. Switching apps does not stop a recording. The one action to avoid is swiping the recorder out of the app switcher, which terminates it.

Does recording work in Airplane Mode?

Recording works entirely offline. Transcription is a separate step and may need the network depending on the language and the audio.