The honest answer: checking for viruses on iPhone is different from checking a Windows computer

iPhones are harder to infect with viruses than computers are, but they are not impossible to infect. Apple's design makes it much rarer — apps run in isolated containers, you cannot read files directly to your phone the way you do on a computer, and Apple reviews every app before it appears in the App Store. But that does not mean your phone cannot get malware.

You cannot run a separate antivirus scanner on an iPhone the way you would on a Windows machine. Apple does not let third-party apps scan your entire system. What you can do instead is look for signs that something is wrong, remove the apps that caused it, and take steps to prevent it from happening again.

Key Takeaways

  • iPhones do not need antivirus software because Apple's App Store review process and system design make infection much less likely than on other devices.
  • Watch for warning signs like sudden battery drain, overheating, unexpected data use, or apps crashing repeatedly — these can point to malware.
  • Delete any app you do not recognize or trust, restart your phone, and check your Apple ID security settings for unauthorized sign-ins.
  • If your phone was jailbroken (modified to bypass Apple's restrictions), restore it from a backup or factory reset it to remove malware completely.
  • The most common way iPhones get infected is through phishing links in messages or emails, not through the App Store itself.

Signs your iPhone may have malware

Malware on an iPhone usually shows itself through behavior changes rather than a visible infection. Battery drain that happens suddenly and cannot be explained by heavy use is a common sign — malware runs in the background and uses power. Overheating without a reason (you are not playing a game or streaming video) can mean something is running that should not be.

Unexpected data use is another red flag. Check Settings > Cellular > Cellular Data to see which apps are using the most data. If an app you rarely use is at the top of the list, that app may be sending information somewhere. Apps that crash repeatedly, freeze, or behave strangely can also indicate malware, though this is more often just a buggy app.

Pop-ups that appear even when you are not using Safari, or a home screen that has apps you did not install, are strong signs of infection. If your phone is suddenly slow across the board, that is less likely to be malware and more likely to be a storage or memory issue — but it is worth checking anyway.

What to do if you think your iPhone has malware

Start by restarting your phone. Hold the power button and either volume button until the power-off slider appears, then slide to power off. Wait 30 seconds and turn it back on. This clears temporary files and stops many types of malware from running. If the problem stops, you may have caught it early.

Next, look through your installed apps. Go to Settings > General > iPhone Storage to see every app on your phone, sorted by size. Delete anything you do not recognize, anything you do not use, or anything that seems suspicious. Tap the app name and choose "Remove App," then "Delete App." If you are not sure whether an app is legitimate, search for it online — malware apps often have names that sound like real apps but are slightly different.

Check your Apple ID security. Go to Settings > [Your Name] > Password & Security > Devices. You should recognize every device listed. If you see a device you do not own, tap it and choose "Remove from Account." Then go to Settings > [Your Name] > Password & Security > Recent Security Events and look for sign-in attempts from places you have never been. If you see suspicious activity, change your Apple ID password when ready.

Clearing Safari history and resetting network settings

If you clicked a suspicious link or visited a website that looked wrong, clear your Safari data. Go to Settings > Safari > Clear History and Website Data. Choose "All time" and tap "Clear History and Data." This removes cookies and cached files that malware sometimes uses to track you or inject code.

Resetting your network settings can also help if malware has changed your DNS (the system that translates website names into addresses). Go to Settings > General > Transfer or Reset > Reset > Reset Network Settings. Your phone will forget all saved Wi-Fi passwords, so you will need to re-enter them, but this clears out any network-level changes malware may have made.

When to factory reset your iPhone

If the malware persists after you have deleted suspicious apps and restarted, a factory reset is the most reliable way to remove it completely. This erases everything on your phone and reinstalls the operating system fresh. Before you do this, back up your data through iCloud or your computer so you can restore your photos, messages, and settings afterward.

Go to Settings > General > Transfer or Reset > Reset > Erase All Content and Settings. Your phone will ask for your Apple ID password — this is a security feature to prevent theft. After the reset completes, you can restore from your backup. If the malware came from an app, do not reinstall that app. If it came from a backup itself (which is rare), you can restore selectively — restore your photos and messages but not your apps, then reinstall only the apps you trust.

Why jailbroken iPhones are at much higher risk

If your iPhone has been jailbroken — modified to remove Apple's restrictions so you can install apps from outside the App Store — your risk of malware infection jumps dramatically. Jailbreaking removes the security boundaries that normally protect your phone. Apps installed from unofficial sources are not reviewed by Apple and often contain malware.

If you have a jailbroken phone and suspect malware, the safest approach is to restore it completely. Connect your phone to a computer with iTunes or Finder, choose your device, and select "Restore." This removes the jailbreak and reinstalls the official operating system. You will lose everything on the phone, so back up first if you need to keep any data.

How to prevent malware on your iPhone going forward

The strongest defense is to only install apps from the official App Store. Apps there are reviewed by Apple before release, which catches most malware. Do not click links in text messages or emails from people you do not know, and be suspicious of links that ask you to "verify your account" or "confirm your password" — legitimate companies do not ask for passwords through links.

Keep your operating system updated. Go to Settings > General > Software Update and install updates as soon as they are available. Apple patches security holes in these updates, and malware often exploits older versions. Turn on two-factor authentication for your Apple ID so that even if someone gets your password, they cannot access your account. Go to Settings > [Your Name] > Password & Security > Two-Factor Authentication and make sure it is on.

Be cautious with public Wi-Fi networks. Malware can spread through unencrypted Wi-Fi, so avoid logging into sensitive accounts (banking, email) on public networks. If you must, use a VPN — a service that encrypts your connection. Avoid downloading files from unknown sources, and do not visit websites that look suspicious or have misspelled names.

Frequently Asked Questions

Do I need antivirus software on my iPhone?

No. Apple's App Store review process and system design make antivirus apps unnecessary and ineffective — they cannot actually scan your entire phone the way they do on a computer. Focus instead on the steps in this guide: watch for warning signs, delete suspicious apps, and keep your operating system updated.

Can I get a virus from visiting a website on Safari?

It is possible but uncommon on iPhone. Safari has built-in protections against malicious websites. The bigger risk is clicking a link in an email or text message that takes you to a fake login page designed to steal your password. Do not enter your Apple ID, banking, or email password on a website you reached through a link — go directly to the official website instead.

What if I see a pop-up saying my iPhone has a virus?

That pop-up is almost certainly a scam. Apple does not send pop-up warnings about viruses. Close Safari completely (swipe up from the bottom of the screen and close the app), and do not tap any buttons in the pop-up. If the pop-up keeps appearing, clear your Safari history and website data as described above.

Can malware steal my passwords and banking information?

Yes, which is why acting quickly matters. If you suspect malware, change your passwords when ready from a different device (a computer or a different phone). For banking, contact your bank directly to let them know. Two-factor authentication makes it much harder for someone to access your accounts even if they have your password.

Is it safe to restore from a backup after a factory reset?

Usually yes. Malware is almost always in apps, not in your photos, messages, or settings. After you factory reset, restore from your backup but do not reinstall the app you suspect caused the problem. If you want to be extra cautious, restore only your photos and messages, then reinstall apps one at a time from the App Store.