Signs your iPhone might have spyware

Spyware on an iPhone usually shows itself through battery drain, unexpected data use, or strange behavior. Your phone may get hot without heavy use, restart on its own, or take longer to shut down. You might notice unfamiliar apps you did not install, or apps crashing repeatedly. Text messages and calls may appear in your logs that you do not remember making.

Performance changes are often the first clue. If your iPhone suddenly feels sluggish, takes longer to open apps, or freezes during normal use, something in the background may be consuming resources. Spyware typically runs constantly to monitor your activity, which drains the battery faster than normal use would.

Check your cellular data usage in Settings > Cellular. If the number is much higher than your typical month, an app or process is transmitting data without your knowledge. Spyware sends stolen information — messages, location, photos — to a remote server, and that transmission uses data even on WiFi.

Key Takeaways

  • Battery drain, unexpected data use, and strange app behavior are common signs spyware may be running on your iPhone.
  • Check Settings > General > iPhone Storage to see which apps are taking up the most space and when they were last used.
  • Review your Apple ID sign-in activity in Settings > [Your Name] > Password & Security to spot logins from unfamiliar devices or locations.
  • Restarting your iPhone in Safe Mode can help you determine whether a third-party app is causing the problem.
  • If you suspect spyware, backing up your data and restoring your iPhone from a clean backup is the most reliable way to remove it.

Check your installed apps and recent activity

Open Settings > General > iPhone Storage to see every app on your phone, how much space each uses, and when it was last opened. Look for apps you do not recognize or do not remember installing. Spyware is sometimes hidden under a generic name like "System Update" or "Settings" to blend in with legitimate apps.

Pay special attention to apps that have not been opened in weeks but still show recent activity in the background. Legitimate apps you do not use regularly will show an older "Last Used" date. If an unfamiliar app shows recent activity, that is a strong sign it is running without your knowledge.

Check Settings > [Your Name] > Password & Security > where you can see a list of all devices signed into your Apple ID and their last sign-in location. If you see a device you do not own or a location you have never been, someone may have access to your account. Tap "Remove" next to any unfamiliar device.

Restart your iPhone in Safe Mode

Safe Mode loads only Apple's built-in software and prevents third-party apps from running. If your iPhone performs normally in Safe Mode but returns to strange behavior when you restart normally, a third-party app is the problem.

To enter Safe Mode on an iPhone with Face ID: press and hold the side button and either volume button until the power-off slider appears. Release both buttons, then press and hold the side button again until "Safe Mode" appears at the top of the screen. On an iPhone with a Home button: press and hold the top (or side) button until the power-off slider appears, then release and press and hold the Home button until the home screen appears.

Use your phone normally for a few minutes. Open Safari, check your email, send a text. If the battery drains at a normal rate and apps respond quickly, you have narrowed the problem to an installed app. If the strange behavior continues in Safe Mode, the issue may be with iOS itself or with a system-level compromise that requires a full restore.

Review your location and privacy settings

Spyware often requests permission to access your location, camera, microphone, or photos. Go to Settings > Privacy & Security and check each category — Location Services, Camera, Microphone, Photos, Contacts, Calendars, Reminders, and Health.

Tap each one and look for apps that have permission but should not need it. A weather app does not need access to your contacts. A flashlight app does not need your location. If you see unexpected permissions, tap the app name and change the setting to "Never" or "Don't Allow."

Pay special attention to Location Services. Tap Settings > Privacy & Security > Location Services, then scroll through the list. Apps with a purple arrow have used your location recently. Apps with a gray arrow have used it in the past 24 hours. If an unfamiliar app shows either symbol, disable location access for that app immediately.

Check your iCloud account for unauthorized access

Spyware sometimes uses your iCloud account to sync stolen data or to maintain access across devices. Go to Settings > [Your Name] > iCloud and review which apps have permission to use iCloud. Disable iCloud access for any app you do not recognize or do not use.

Check Settings > [Your Name] > iCloud > Manage Storage to see what is taking up space in your iCloud account. Look for unfamiliar backups or data from apps you do not use. If you see a backup from a device you do not own, that is a sign someone else has access to your account.

Review your Apple ID security settings at Settings > [Your Name] > Password & Security. Check "Recent Security Events" to see if anyone has tried to sign into your account from an unfamiliar location. If you see suspicious activity, change your Apple ID password immediately and enable two-factor authentication if you have not already.

Back up and restore your iPhone

If you have found signs of spyware and cannot identify which app is responsible, the most reliable way to remove it is to restore your iPhone from a backup made before the spyware was installed. This erases everything on your phone and reinstalls iOS from scratch.

First, back up your current iPhone to iCloud or to a computer using Finder (on Mac) or iTunes (on Windows). Go to Settings > [Your Name] > iCloud > iCloud Backup and tap "Back Up Now," or connect to a computer and use Finder or iTunes to create a local backup. This backup will include the spyware, but you will not restore from it.

Next, erase your iPhone. Go to Settings > General > Transfer or Reset > Erase All Content and Settings. Your iPhone will restart and ask you to set it up as new or restore from a backup. Choose a backup from before you noticed the suspicious behavior. If you do not have an older backup, set up as new and reinstall your apps one at a time, watching for the strange behavior to return.

Prevent spyware in the future

Keep iOS updated. Apple releases security patches regularly, and spyware often exploits known vulnerabilities that updates fix. Go to Settings > General > Software Update and install updates as soon as they become available.

Download apps only from the App Store. Third-party app stores and sideloaded apps bypass Apple's security review and are common vectors for spyware. Even on the App Store, read reviews and check the app's permissions before installing.

Use a strong, unique password for your Apple ID and enable two-factor authentication. This prevents someone from signing into your account and installing spyware remotely. Go to Settings > [Your Name] > Password & Security to set this up.

Be cautious with links in emails, texts, and social media. Spyware is often installed when you click a malicious link or download a file from an untrusted source. Do not click links from people you do not know, and verify unexpected messages from known contacts by calling them directly.

Frequently Asked Questions

Can spyware hide from the App Store?

Some spyware disguises itself as a legitimate app and passes Apple's review process, but this is rare. More commonly, spyware is installed through a malicious link or a jailbroken device. If your iPhone is not jailbroken and you only download from the App Store, your risk is much lower than on Android.

Will restarting my iPhone remove spyware?

A normal restart will not remove spyware — it will still be there when your phone boots back up. However, restarting can sometimes interrupt spyware temporarily and give you a window to identify which app is causing problems. Safe Mode is more useful because it prevents third-party apps from running at all.

What if I think someone has my iCloud password?

Change your Apple ID password immediately at Settings > [Your Name] > Password & Security > Change Password. Then sign out of iCloud on all devices and sign back in with your new password. Review your recent sign-in activity and remove any unfamiliar devices. Enable two-factor authentication if you have not already.

Can I remove spyware without erasing my iPhone?

If you can identify the specific app causing the problem, you can delete it from Settings > General > iPhone Storage, tap the app, and tap "Delete App." However, if the spyware is deeply embedded or you cannot identify which app it is, a full restore is more reliable. Spyware sometimes leaves traces that a simple app deletion does not remove.

Is my iPhone definitely compromised if the battery drains fast?

Not necessarily. Battery drain has many causes — old battery health, heavy app use, high screen brightness, or background app refresh. Check Settings > Battery to see which apps are using the most power. If one app is using far more than others, that is worth investigating. If battery drain is spread across several apps, the issue is likely not spyware.