What you can actually detect on your own devices

You cannot reliably detect a listening device just by looking at your phone or computer. What you can do is check for signs that something is using your device's microphone without your knowledge — and that's what matters for your safety.

The difference is important: a physical bug (a tiny recorder hidden in your room) requires a sweep with specialized equipment that most people don't have. But spyware that activates your microphone leaves traces you can find yourself. This guide covers the second one, because it's the threat you can actually do something about.

The most common listening threats are apps you installed yourself (or that came pre-installed), permission settings you never checked, and malware that got onto your device through a link or read. You can inspect all three without special tools.

Key Takeaways

  • Check which apps have microphone permission in your phone's settings — remove it from anything that doesn't need it, like games or flashlight apps.
  • Look for unfamiliar apps you don't remember installing, especially ones with generic names or that hide in folders you rarely open.
  • Watch your phone's battery drain and data usage; spyware that records constantly uses both noticeably.
  • On Android, check Settings > Apps > Permissions > Microphone; on iPhone, go to Settings > Privacy > Microphone and review the list.
  • If you find something suspicious, uninstall it when ready and consider a full device reset if the app won't delete or keeps reappearing.

How to review microphone permissions on Android

Open Settings, then tap Apps (sometimes labeled Applications). Look for an option called Permissions or App Permissions. Tap Microphone. You'll see a list of every app that has asked for microphone access.

Go through the list and ask yourself: does this app actually need my microphone? A voice recorder, messaging app, or video call app — yes. A flashlight app, a game, a weather app, a calculator — no. If something unexpected has microphone permission, tap it and select Don't Allow or Deny.

Some apps will ask for permission again the next time you use them. That's normal. If an app asks for microphone permission and you deny it, the app may not work properly — that's a sign the permission is actually tied to its function. But if a game or utility app asks for microphone access and you never use that feature, denying it is safe.

How to review microphone permissions on iPhone

Open Settings, scroll down and tap Privacy, then tap Microphone. You'll see a list of apps with a toggle next to each one showing whether microphone access is on or off.

Review the list the same way: does this app need your microphone? Turn off the toggle for anything that doesn't. Unlike Android, iPhone apps cannot ask for permission again after you deny it — the toggle stays off until you manually turn it back on.

Pay special attention to apps you haven't used in months. If something has microphone permission but you never open it, turn it off. You can always turn it back on later if you need it.

Finding apps you don't recognize

Go to your app list and scroll slowly through everything installed. On Android, open Settings > Apps and look for anything with a generic name (like "System Update," "Device Manager," "Service," or "Tool") that you don't remember installing. On iPhone, open Settings > General > iPhone Storage and scroll through the full list.

Malware and spyware often use bland names to avoid standing out. If you see an app you don't recognize, tap it and look at the publisher name. A real app from Google, Apple, Microsoft, or a company you know is legitimate. An app from "XYZ Corp" or a name you've never heard of, especially if it has a generic function, is worth investigating.

You can also check when the app was installed. On Android, tap the app and look for an "Install Date" field. On iPhone, tap the app and look for "Downloaded" or "Installed" information. If something was installed recently and you don't remember doing it, that's a red flag.

If you find an app you don't recognize, uninstall it when ready. On Android, tap the app and select Uninstall. On iPhone, press and hold the app icon, then select Remove App > Delete App. If the uninstall option is grayed out or won't work, that's unusual — it may mean the app has admin privileges (see the next section).

Checking for apps with admin access

Some spyware requests Device Administrator access, which gives it deeper control over your phone. On Android, open Settings > Security (or Security and Privacy) > Device Admin Apps or Administrator Apps. You'll see a list of apps with admin privileges.

Most of this list should be empty or contain only legitimate apps like your mobile carrier's app or your company's security software. If you see something unfamiliar, tap it and select Deactivate or Remove. Once you remove admin access, you can uninstall the app normally.

iPhone doesn't have a direct equivalent to Device Administrator, but some apps can request Full Disk Access or Accessibility permissions, which are similar. Go to Settings > Privacy and check Accessibility and Full Disk Access. Remove anything you don't recognize.

Signs that spyware is actively using your microphone

If your phone's battery drains much faster than usual, especially when you're not using it, something in the background is working hard. Spyware that records audio constantly burns battery. Open Settings > Battery (or Battery Health on iPhone) and look at which apps are using the most power. If something you barely use is at the top of the list, investigate it.

Similarly, check your data usage. Open Settings > Mobile Data (Android) or Settings > Cellular (iPhone) and look at which apps have used the most data over the past month. Spyware that uploads audio files uses noticeable data, especially if you're on Wi-Fi most of the time. An app using gigabytes of data when you've never opened it is suspicious.

You may also notice your phone getting hot, your screen flickering, or your phone becoming slow or unresponsive. These are signs something is running in the background. None of these prove spyware, but combined with unfamiliar apps or unexpected permissions, they're worth taking seriously.

What to do if you find something suspicious

If you find an app you don't recognize, remove its permissions first (especially microphone access), then uninstall it. Restart your phone after uninstalling. If the app reappears or you can't uninstall it, your phone may have malware that runs deeper than a normal app.

In that case, consider a full factory reset. On Android, go to Settings > System > Reset Options > Erase All Data. On iPhone, go to Settings > General > Reset > Erase All Content and Settings. A factory reset removes everything on your phone and reinstalls the operating system fresh. Back up your important data first (photos, contacts, documents) to a computer or cloud service, then reset.

After a reset, reinstall only the apps you actually use. Don't restore from a backup if you suspect malware — restore individual files and data instead. If the suspicious app or behavior returns after a reset, your phone may have been compromised at a level that requires professional help, or someone with physical access to your device may be reinstalling malware. At that point, contact your phone's manufacturer support or a local repair shop.

Frequently Asked Questions

Can someone listen through my phone camera too?

Yes. Check your camera permissions the same way you check microphone permissions. Go to Settings > Privacy > Camera (iPhone) or Settings > Apps > Permissions > Camera (Android). Remove camera access from anything that doesn't need it. You can also cover your camera with tape or a camera cover as a physical safeguard.

What if I find an app I need but it has suspicious permissions?

Some apps request permissions they don't actually use. If you trust the app and need it, you can deny the permission and see if the app still works. Many apps function fine without microphone access even if they request it. If the app stops working, you can turn the permission back on. Trust your judgment about whether you need the app more than you need to deny it access.

Will checking my permissions slow down my phone?

No. Reviewing permissions and uninstalling apps will not slow your phone down. In fact, removing apps and revoking unnecessary permissions may speed it up slightly by freeing up storage and reducing background processes.

Is there an app that can detect spyware for me?

Some security apps claim to detect spyware, but they're not reliable. The most effective detection is what you're doing now: checking permissions, looking for unfamiliar apps, and watching for unusual battery or data drain. If you want an extra layer, a reputable antivirus app like Malwarebytes or Bitdefender can scan for known malware, but they won't catch everything.

Can I tell if someone is listening through my computer microphone?

Yes, using similar methods. On Windows, go to Settings > Privacy & Security > Microphone and review which apps have access. On Mac, go to System Settings > Privacy & Security > Microphone. Look for unfamiliar programs. You can also check your Task Manager (Windows) or Activity Monitor (Mac) for processes running in the background that you don't recognize, though this requires more technical knowledge.