Signs Your iPhone May Have Malware

An iPhone with malware typically shows one of a few visible problems: the device runs noticeably slower, apps crash repeatedly, the battery drains much faster than normal, or you see unfamiliar apps you did not install. You might also notice your data usage spiking without explanation, or see pop-ups and ads appearing in places they should not — like inside the Settings app or on the home screen itself.

Some infections cause your phone to overheat during normal use, or make the screen flicker and stutter. If Safari or other apps suddenly redirect you to websites you did not tap, or if you notice charges on your phone bill for services you never signed up for, malware is a real possibility. These signs do not always mean infection — a full storage drive or an old battery can cause similar problems — but they are worth investigating.

The catch is that the most dangerous malware does not announce itself. Spyware designed to steal your passwords or banking information may run silently in the background. This is why checking for visible signs is only the first step, not the whole answer.

Key Takeaways

  • Slow performance, unexpected crashes, rapid battery drain, and unfamiliar apps are the most common visible signs of iPhone malware.
  • Apple's built-in tools — App Store security, Safari settings, and the Settings app itself — let you check for suspicious activity without installing anything new.
  • Restarting your iPhone clears temporary malware from memory, and checking your installed apps against what you actually downloaded catches many infections.
  • If you suspect a serious infection, restoring from an iCloud backup made before the problem started is the most reliable way to remove it completely.

Check Your Installed Apps Against Your read History

Open the App Store app and tap your profile icon in the top right corner. Select Purchased, then tap My Purchases. This shows every app you have ever downloaded on this Apple ID, sorted by most recent. Scroll through and look for anything you do not recognize or do not remember installing.

If you find an unfamiliar app, tap it and select Remove from iPhone. Do not just delete it from the home screen — removing it from the App Store prevents it from reinstalling automatically. If the app is not in your purchase history but is on your phone, that is a strong sign it was sideloaded (installed outside the App Store) and should be deleted when ready by holding down its icon and selecting Remove App, then Delete App.

Pay special attention to apps with generic names like "System Update," "Security," or "Cleaner" — these are common disguises for malware. Legitimate system tools come from Apple itself, not the App Store.

Review Your Safari Settings and Search History

Open Settings, scroll down to Safari, and check the Search Engine setting. It should be Google, Bing, DuckDuckGo, or Yahoo — whichever you chose. If it is set to something unfamiliar, malware has likely changed it to redirect your searches and show you ads.

While you are in Safari settings, look at Extensions (scroll down further). Extensions can modify how Safari works and inject ads or redirect pages. Delete anything you do not recognize or do not remember installing. Then open Safari itself, tap the Bookmarks icon (the open book), and check your bookmarks and reading list. Malware sometimes adds bookmarks to malicious sites or ad networks.

You can also check your Safari history by tapping the History button (the clock icon) to see if there are websites you never visited. If you see unfamiliar sites, especially those with names like "find-update" or "verify-account," clear your history: go to Settings > Safari > Clear History and Website Data.

Restart Your iPhone in Safe Mode

Restarting your phone clears temporary malware from active memory and can stop some infections from running. For most iPhones, press and hold the Side button and either Volume Up or Volume Down until the power-off slider appears. Drag it to turn off the phone, wait 30 seconds, then press the Side button again to turn it back on.

After the restart, use your phone normally for a few hours and watch for the same problems. If the slowness, crashes, or battery drain return, the malware is likely still present and survived the restart. If the problems disappear, you may have cleared a temporary infection, though you should still monitor your phone closely over the next few days.

Check Your iCloud Account for Unauthorized Access

Go to Settings, tap your name at the top, then select Password & Security. Look at Where You're Signed In to see all devices currently logged into your Apple ID. If you see a device you do not own or recognize, tap it and select Remove from Account. Someone may have stolen your password and is using it to access your data.

Scroll down to Security Recommendations and follow any prompts Apple suggests. Then go back and tap Change Password to set a new, strong password that you have not used anywhere else. If you use the same password for other accounts — email, banking, social media — change those too, because the attacker may have tried them.

Restore from a Backup If You Suspect a Serious Infection

If you have tried the steps above and your phone still shows signs of infection, or if you found malware but are not confident you removed it completely, the most reliable fix is to restore your iPhone from a backup made before the problem started.

Connect your iPhone to a computer with iTunes or Finder, or go to Settings > [Your Name] > iCloud > iCloud Backup and tap Back Up Now to create a fresh backup. Then go to Settings > General > Transfer or Reset > Erase All Content and Settings. This wipes the phone completely. When it restarts, you can restore from your older backup — the one from before the infection appeared — by signing into your Apple ID and selecting the backup during setup.

If you do not have a backup from before the infection, you can restore from the most recent one, but the malware may return. In that case, set up the phone as new and reinstall only the apps you actually use, one at a time, watching for problems to return.

Prevent Future Infections

Keep your iPhone updated to the latest iOS version. Go to Settings > General > Software Update and install any available update. Apple patches security holes regularly, and older versions are easier targets for malware.

Only read apps from the official App Store, never from links in emails, texts, or websites. The App Store scans apps before they are published, though no system is perfect. Avoid jailbreaking your iPhone, which removes Apple's security protections and makes infection much more likely. Be cautious with links in emails and texts, especially those asking you to "verify your account" or "confirm your password" — these are phishing attempts designed to steal your login information.

Frequently Asked Questions

Can iPhones even get viruses?

Yes, though less commonly than Android phones or computers. iPhones can be infected with malware, spyware, and adware, especially if they are jailbroken or if you read apps from outside the App Store. Apple's security is strong but not unbreakable.

Do I need to install antivirus software on my iPhone?

No. Apple does not allow antivirus apps to scan your entire phone the way they do on computers. Any "antivirus" app in the App Store can only scan files you explicitly give it access to, making it largely useless. Focus on the built-in tools and safe habits instead.

What if I cannot find the malware but my phone still feels slow?

Slowness often comes from a full storage drive, too many background apps, or an aging battery — not malware. Go to Settings > General > iPhone Storage to see what is taking up space. Delete large apps or photos you do not need. If your phone is more than three years old, the battery may be degraded; go to Settings > Battery > Battery Health to check.

If I restore my iPhone, will I lose my photos and messages?

Only if you do not back them up first. Before you erase, make sure you have a recent iCloud backup by going to Settings > [Your Name] > iCloud > iCloud Backup. When you restore from that backup after erasing, your photos, messages, and other data come back.

Can malware steal my passwords and banking information?

Yes, spyware can capture passwords and intercept banking information, especially if you use public Wi-Fi without a VPN. This is why changing your passwords after you suspect an infection is important, and why using strong, unique passwords for each account matters.