"Another app is using the microphone" — how to find and fix it
That message means something else holds the microphone. Phones generally allow one active capture session at a time, so the recorder can't start or continue until the other app releases it. The fix is to identify the holder — usually a call, an assistant, dictation, the camera, a screen recorder or a messaging app — close it, and start recording again.
Try this first
- End any active or background call, including VoIP calls left running.
- Close the camera, screen recorder and any voice-note or walkie-talkie app.
- Cancel dictation or voice typing if a keyboard microphone is active.
- Check the privacy dashboard to see which app used the microphone most recently.
- If it persists, restart the phone — that clears a stuck session.
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Diagnose my recording issueFind who's holding it
Android: open the privacy dashboard (Settings → Security & privacy → Privacy → Privacy dashboard, or Settings → Privacy) and look at recent microphone access. The green dot in the status bar shows current use; tapping it names the app.
iPhone: the orange dot means the microphone is in use. Swipe into Control Centre to see which app has it. Settings → Privacy & Security → Microphone lists everything with permission, which is a good place to spot an app you'd forgotten was listening.
The usual holders
| App type | Why it holds the microphone |
|---|---|
| Phone and VoIP calls | Exclusive input for the duration of the call |
| Voice assistants | Listening for and processing a request |
| Dictation / voice typing | Live speech input to the keyboard |
| Camera recording video | Video capture takes the audio input too |
| Screen recorders with mic audio | Explicitly recording the microphone |
| Messaging apps recording voice notes | Capture while the record button is held |
| Live transcription or captioning apps | Continuous listening |
| Fitness, meditation or game apps | Occasionally, for voice features |
A background VoIP call that never fully ended is a classic: the call UI is gone, but the session isn't.
Get the microphone back
- End the call or close the app that holds it.
- Swipe that app away from recents so no leftover session remains.
- Start a short test recording — 30 seconds — and confirm the input works.
- If the error persists with nothing obvious running, restart the phone. That clears any stuck capture session.
- If it comes back regularly, remove microphone permission from apps that don't need it: Settings → Privacy → Microphone.
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.
Stop it recurring during long sessions
- Turn off assistant voice activation while recording.
- Don't record video or send voice notes mid-session.
- Use Do Not Disturb / Focus to keep calls out.
- Don't run live transcription alongside a recorder.
- Prefer a recorder that tells you when it was interrupted, so you learn at the time.
It isn't a bug in your recorder
The one-capture-at-a-time model is how mobile operating systems allocate the microphone, and it protects you: it's the reason two apps can't silently listen at once. No app can override it — which is also why "records through calls" claims are worth treating with suspicion.
Where BlackBox fits
BlackBox shows a clear recording status and can notify you when its session is interrupted, so you find out that the microphone was taken instead of discovering a gap later. Once another app releases the microphone, start recording again and you're back.
Frequently asked questions
How do I find which app is using my microphone?
Android: the privacy dashboard and the green status-bar dot. iPhone: the orange dot plus Control Centre, and Settings → Privacy & Security → Microphone for the full permission list.
Why does the error appear when nothing is obviously running?
Usually a background VoIP call or an app with a stuck capture session. Swipe the suspect away from recents; if it persists, a restart clears it.
Can two apps record from the microphone at once?
As a rule, no. Mobile operating systems allocate active capture to one app at a time, which is why a call or assistant interrupts a recorder.
Related fixes
Go deeper
Record with BlackBox
Designed for continuous and scheduled background recording, on-device and private. Operating-system restrictions still apply — test it on your device first.