iPhone viruses are rare, but you should still know what to look for

iPhones get fewer viruses than Android phones or computers because Apple controls what software can be installed and how it runs. Every app goes through Apple's review process before it reaches the App Store. That said, malware can still reach your phone through phishing links, fake apps that slip past review, or compromised Wi-Fi networks. The signs are usually the same: your phone drains battery faster than normal, runs hot, crashes often, or shows apps you don't remember installing.

The good news is that checking for a virus on iPhone is straightforward. You don't need antivirus software the way you might on a computer. Instead, you look for suspicious behavior, review what's installed, and use built-in tools to see what's happening in the background.

Key Takeaways

  • Check your iPhone's battery health in Settings > Battery > Battery Health & Charging to see if something is draining power faster than it should.
  • Go to Settings > General > iPhone Storage to see all installed apps and remove anything you don't recognize or remember downloading.
  • Look at Settings > Privacy to see which apps have permission to access your location, camera, microphone, and contacts — remove permissions from apps that don't need them.
  • Restart your iPhone in Settings > General > Shut Down, then slide to power off; this stops most malware from running in the background.
  • If problems persist after removing suspicious apps and restarting, back up your data and restore your iPhone using a computer or iCloud.

Check battery health and background activity

A virus or malware often makes your iPhone work harder than it should, which drains the battery and generates heat. Open Settings, tap Battery, then tap Battery Health & Charging. Look at the Maximum Capacity number — if it's below 80% and you haven't owned the phone for years, something may be running in the background. Also check the Charging section: if your phone is charging slowly or overheating, that's a sign of unusual activity.

Next, look at what's actually using that battery. In Settings, go to Battery and scroll down to see which apps consumed the most power in the last 24 hours or the last 10 days. If an app you barely use is at the top of the list, that's suspicious. Apps like Mail, Messages, or Maps using significant battery is normal. A game or social media app using 40% of your battery when you haven't opened it is not.

Review installed apps and remove unfamiliar ones

Go to Settings > General > iPhone Storage. This shows every app on your phone, sorted by size. Scroll through the entire list and look for apps you don't recognize or don't remember installing. Malware sometimes hides under names that look like system apps — for example, "System Update" or "Security Check" when no such app exists in the App Store. If you see anything suspicious, tap it and select Delete App, then Delete App again to confirm.

Pay special attention to apps installed recently. Tap the app name to see when it was installed. If you see an app from the last few days that you didn't read, that's a red flag. Also check apps that ask for unusual permissions — a flashlight app that wants access to your contacts, or a calculator that wants location data, is behaving like malware even if it isn't technically one.

Check app permissions and disable unnecessary access

Go to Settings > Privacy. You'll see a list of sensitive features: Location Services, Contacts, Calendar, Photos, Camera, Microphone, Health, and others. Tap each one and review which apps have permission to use it. Remove permissions from any app that doesn't need them. A weather app doesn't need access to your contacts. A note-taking app doesn't need your camera.

Pay close attention to Location Services. Tap Settings > Privacy > Location Services and look for apps with a purple or gray arrow next to their name. A purple arrow means the app used your location recently. A gray arrow means it asked for permission but hasn't used it yet. If an app you don't use often has location access, turn it off by tapping the app name and selecting Never.

Restart your iPhone to stop background processes

A restart stops most malware from running. Go to Settings > General > Shut Down. Wait for the slider to appear, then drag it to power off. Wait 30 seconds, then press and hold the power button until you see the Apple logo. This forces a clean restart and clears temporary files that malware might be using.

After the restart, check your phone's behavior for a few hours. If battery drain stops, crashes disappear, or the phone stops running hot, the malware was likely a background process that the restart cleared. If problems continue, move to the next step.

Clear Safari history and cached data

Malware sometimes enters through a phishing link you clicked in Safari or another browser. Go to Settings > Apps > Safari. Tap Clear History and Website Data. Choose how far back to clear — if you're concerned about a recent infection, clear the last hour or last day. This removes cookies and cached files that malware might be using to track you or inject code.

Also check if you have any unfamiliar profiles installed. Go to Settings > General > VPN & Device Management. If you see a profile you don't recognize, tap it and select Delete. Malware sometimes installs a profile to intercept your network traffic or redirect web searches.

Restore your iPhone if the problem persists

If you've removed suspicious apps, restarted, cleared Safari data, and your phone still shows signs of malware, the safest option is to restore it. This erases everything and reinstalls the operating system fresh. Before you do this, back up your data. Go to Settings > [Your Name] > iCloud > iCloud Backup and tap Back Up Now. Wait for the backup to finish.

Once backed up, go to Settings > General > Transfer or Reset > Erase All Content and Settings. Follow the prompts to erase your phone. When it restarts, you can restore from your backup. This removes any malware that was embedded in the system. After restoring, reinstall only the apps you actually use, and avoid sideloading apps from outside the App Store.

Prevent future infections

read apps only from the App Store, not from links in emails or text messages. Be skeptical of apps that ask for unusual permissions — a calculator doesn't need your location. Don't click links in emails or texts from people you don't know, even if they claim to be from Apple or your bank. Apple will never ask you to click a link to verify your account.

Keep your iPhone updated. Go to Settings > General > Software Update and install updates as soon as they're available. Updates patch security holes that malware exploits. Also turn on two-factor authentication for your Apple ID. Go to Settings > [Your Name] > Password & Security > Two-Factor Authentication and make sure it's on. This prevents someone from accessing your account even if they get your password.

Frequently Asked Questions

Do I need antivirus software on my iPhone?

No. Apple's App Store review process and the way iOS isolates apps make traditional antivirus unnecessary. Apps claiming to scan for viruses on iPhone don't actually scan — they can't access other apps' data. If an app promises virus protection, it's either misleading or itself suspicious. Stick to the built-in tools in Settings.

Can I get a virus from visiting a website?

Visiting a website alone won't infect your iPhone. However, clicking a link in an email or text that takes you to a phishing site could trick you into entering your Apple ID password or credit card information. The damage comes from what you type, not from the website itself. Never enter sensitive information on a site you reached through an unexpected link.

What does it mean if my iPhone says "iPhone storage almost full" but I have plenty of space?

This usually means cached files or temporary data is taking up space, not malware. Go to Settings > General > iPhone Storage and look for apps with large "Documents & Data" sizes. Delete and reinstall the app to clear that cache. If the message persists after a restart, it's a system glitch, not a security threat.

Is it safe to use public Wi-Fi if I think my phone has malware?

No. Public Wi-Fi is already risky because anyone on the network can see unencrypted traffic. If your phone is infected, using public Wi-Fi could expose your data further. Wait until you're on a trusted network, or use your phone's cellular data instead. If you must use public Wi-Fi, avoid logging into banking or email accounts.

What should I do if I clicked a suspicious link?

Don't panic. Clicking a link doesn't automatically infect your phone. If the link took you to a website asking for your Apple ID or password, change your Apple ID password when ready. Go to Settings > [Your Name] > Password & Security > Change Password. If you entered payment information, contact your bank. Then follow the steps above to check for malware.