How to Detect Spyware on an iPhone

Simon Lewis

By Simon Lewis

Updated:

Imagine someone reading your texts, seeing your photos, or even knowing your bank details. It’s a chilling thought but often a reality for countless iPhone users.

In 2024 alone, Apple has had to fix several security flaws in iOS 18, not to mention countless other security issues that have left iPhones vulnerable to hackers.

While those flaws were patched, new security threats still emerge daily.

Spyware, disguised as harmless apps, can steal your most sensitive data. Don’t wait to become a victim—this guide shows you how to detect and remove spyware from your iPhone before it’s too late.

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How to Detect Spyware on iPhones

Despite their stellar reputation for having robust security features, iPhones aren’t exempt from spyware programs. Wondering whether you might have spyware on your iPhone? Here are some ways to tell:

1. Check for unknown or suspicious apps

We’ve all been there—sifting through our devices, stumbling across unknown apps and thinking, “When did I download these?” Most of the time, a forgotten app is just that. But sometimes, the reason you’re finding unknown apps can be more sinister.

When unknown apps surface on your iPhone, it’s not always a case of forgetfulness. Some spyware disguises itself as legitimate-looking apps that sneak past our defenses.

To detect suspicious or unfamiliar apps on an iPhone, you can follow these steps:

1️⃣ Check App Library

Swipe to the App Library (last page on your Home Screen) to see all installed apps. Look for apps you don’t recognize or remember installing.

Don’t forget to check the Hidden Apps folder. Hackers may place malicious apps there to avoid detection.

2️⃣ Review storage usage

Go to Settings > General > iPhone Storage. This section lists apps and their storage usage.

Look for unfamiliar apps, especially those with vague names or icons, which may signal hidden or potentially unwanted apps.

lightbulb icon

What should you search for to find hidden spy apps?

Search for jailbreak-related apps like Cydia, Sileo, or Checkra1n. Even if your iPhone isn’t jailbroken, these apps might be present if someone else has tampered with it.

Also, look out for apps with generic names like SystemCore, SystemUpdate, or Phone Monitor—these may hint at spyware.

Lastly, if you’re unsure about an app, tap on it for more details. Check if it appears in the Apple App Store and read user reviews to verify its legitimacy. It’s also worth mentioning that you should never download apps outside Apple’s official app store.

Fig 1. Reviewing storage usage by app on iPhone.

3️⃣ Inspect app permissions

Go to Settings > Privacy & Security and review app permissions, such as Location, Camera, Microphone, etc. This can help you spot apps accessing data they shouldn’t.

If you find a suspicious app, locate it in your App Library and long-press on the app icon until a menu appears. Tap Remove App and then Delete App to uninstall it.

Fig 2. Reviewing apps with access to location on iPhone.

2. Monitor your data usage

Data usage naturally ebbs and flows based on our online activities, but when you observe a sudden surge, there might be more at play than just excessive video streaming.

Spyware often collects data from your device and secretly transmits it to an external server. This under-the-radar operation can cause a spike in your data consumption.

Track your mobile data usage over a few days or weeks to understand how much you typically use over a given period. If you notice a strange spike in usage, this may be a sign that your device has spyware installed.

Here’s how to check your data usage:

  1. Go to Settings on your iPhone
  2. Tap Cellular (or Mobile Data for some carriers).
  3. In the Cellular Data section, you’ll see an overview of “Current Period” data usage and, if applicable, “Current Period Roaming” data usage. This summary provides the total amount of data used since the last reset.
  4. Tap Show All to see a list of apps and the amount of cellular data each one used in the current period. Identify any unusually high data consumption for apps you rarely or never use.

Fig 3. Viewing data usage by app on iPhone.

3. Keep an eye on your battery usage

While factors like age, battery health, and heavy app usage can contribute to battery depletion, an unexpected battery drain can point toward spyware programs working overtime in the background.

Because spyware is always running in the background to keep track of your activities, it can use up your battery life at an abnormal rate. If you’ve ruled out other factors draining your battery, it’s time to investigate what might be happening behind the scenes.

Here’s how to check battery usage:

  1. Go to Settings > Battery to view detailed battery usage by app.
  2. Scroll down to see apps that have used the most battery in the past 24 hours or the last 10 days.
  3. Check for unusual apps consuming battery in the background, especially those with high background activity you didn’t expect.

Fig 4. Viewing battery usage by app on iPhone.

4. Run a spyware scan

Often the easiest way to detect and remove spyware is to use a detected anti-spyware tool like Certo AntiSpy. This type of software can find many threats and help remove them in just a few clicks.

In addition, you can use it to run system checks, analyze your operating system, and review app permissions to identify vulnerabilities.

Certo AntiSpy takes a unique approach to threat detection on iPhones, meaning it can detect more threats than any other iPhone security solution.

Here’s why Certo AntiSpy is ideal for keeping your iPhone secure:

  • Find and block spyware, suspicious apps, keyloggers, and more
  • Remove suspicious apps and files
  • A unique, deep scanning method finds threats that other apps cannot
  • Award-winning and trusted by over 1,000,000 users

Video: How to scan your iPhone for spyware

Check out this related video ⬇️

5. Look out for suspicious text messages

Some spyware can be installed remotely by tricking users into clicking on malicious links embedded in text messages, also known as phishing messages. These messages often appear to come from trusted sources like banks, delivery services, or well-known brands.

Recognizing and avoiding these messages is crucial for keeping your iPhone secure. Here’s how to spot spyware-infected messages:

  1. Check for Unfamiliar Senders: Be wary of text messages from numbers you don’t recognize, especially if the message includes links or attachments. Hackers often use random or spoofed numbers to deliver phishing attempts.
  2. Look for Unusual Wording or Urgency: Phishing messages often try to instill a sense of urgency to get you to click on a link quickly. Messages with phrases like “Your account will be closed unless…” or “You’ve won a prize!” are red flags.
  3. Check for Strange Symbols, Spelling Mistakes, or Odd Formatting: Attackers often rush to send out large-scale phishing messages and may overlook basic spelling and grammatical errors. If a message looks off, trust your instincts.
  4. Check for Suspicious Links or Attachments: Be extra cautious with any message containing links or file attachments. Hover over links (by holding down on them) to preview the URL before clicking, and avoid downloading attachments unless you’re absolutely sure they’re safe.

Pro Tip: Spyware installed through a phishing message may operate in the background, draining your battery, increasing data usage, or causing performance slowdowns. If you notice any of these signs, run a scan with Certo Antispy to detect and remove threats immediately.

How to Protect Your iPhone Against Spyware

Detecting spyware on your iPhone is a vital first step, but true security goes beyond detection — it’s about prevention. By actively protecting your device from threats, you can stay one step ahead of hackers.

Here are 8 simple ways to protect your iPhone from spyware and safeguard your most sensitive data from cybercriminals.

🟢 Update your iOS to the latest version

If your device’s operating system is outdated, you could be vulnerable to spyware attacks. System updates often include security patches that fix exploits used by spyware. Here’s how to check whether a software update for iOS is available on your device:

  1. Go to Settings > General.
  2. Tap on Software Update. Your device will check for updates
  3. If an update is available, you’ll see its version number and description
  4. If you wish to proceed with the update, tap Download and Install.

Fig 5. Updating the iOS version on iPhone.

🟢 Update your apps

Just like you should ensure your iOS is up-to-date, keeping all your installed apps current is equally essential. Developers regularly release security patches, so staying updated is one of your primary defenses against potential vulnerabilities.

To update your apps:

  1. Open the App Store.
  2. Tap your profile icon in the top right.
  3. Scroll down and tap Update All if any updates are available.

🟢 Use a strong passcode

Most iPhone spyware requires the hacker to physically access your device to install it. Therefore, a strong unlock passcode that’s difficult to guess can be one of the best ways to protect against a spyware attack.

Use a combination of uppercase and lowercase letters, numbers, and special symbols, and don’t base your passcode on easily guessed information, like your birthday.

🟢 Use two-factor authentication

Some iPhone spyware works by accessing your iCloud account and stealing data synced from your phone, such as photos and messages. Therefore, using two-factor authentication with your Apple ID is another important way to protect your iPhone from hackers.

Two-factor authentication (2FA) is a security feature that enhances the safety of your accounts beyond just a password. Even if cybercriminals decipher your password, 2FA prevents them from breaking into your account.

To access your account with 2FA, you’ll need to provide two forms of authentication. This typically combines something you know (such as your password) with something you receive and input (for instance, a code produced by an application or a single-use password delivered through SMS or email).

🟢 Don’t open suspicious links

Clicking on suspicious links or attachments can give surveillance software, spyware, and malware direct access to your device.

Don’t click on links in emails or texts from contacts you don’t recognize; be careful about clicking on unknown links while browsing the internet.

🟢 Run regular anti-spyware scans

If your iPhone is infected with spyware, your messages, calls, photos, and other private information could be exposed.

Regularly scan your device for iPhone spyware and malicious software. Not sure how to do this? Certo AntiSpy makes detecting and removing spyware easier than ever and protects your phone.

🟢 Enable Lockdown mode

Lockdown mode is an optional, extreme protection measure that can be turned on to help combat targeted and sophisticated cyberattacks, such as Pegasus.

When enabled, your device will function differently. Some apps, websites, and features will be limited, and some experiences will be completely unavailable.

While this doesn’t protect against all hacking methods, it can help against certain types of advanced spyware.

Lockdown mode can be enabled as follows:

  1. Open the Settings app.
  2. Tap Privacy & Security.
  3. Under Security, tap Lockdown Mode and tap Turn On Lockdown Mode.
  4. Tap Turn On Lockdown Mode.
  5. Tap Turn On & Restart, then enter your device passcode.

Fig 6. Enabling Lockdown Mode on iPhone.

🟢 Reset iPhone

If you’re concerned about spyware and other methods haven’t worked, you can factory reset your iPhone as a last resort to remove any hidden or malicious software.

Here’s how:

  1. Go to Settings > General > Transfer or Reset iPhone.
  2. Tap Erase All Content and Settings.
  3. If prompted, enter your passcode and confirm the reset. You may need to enter your Apple ID password to turn off Find My iPhone.
  4. The iPhone will reset and restart, erasing all data and settings and returning it to factory settings.

Why Would Someone Hack Your iPhone?

There are many reasons someone might want to hack your phone. The most common is to collect data about an aspect of your personal life or for monetary gain.

Here are a few examples that detail why someone would install malicious programs on your iPhone and how they could abuse your private data:

Cyberstalking

Cyberstalking is one of the most common uses of spyware apps, often carried out by someone close to you. Some examples of cyberstalking are:

  • Accessing private text messages for use in divorce proceedings.
  • Monitoring of GPS locations by a jealous spouse or partner.
  • Accessing your iPhone remotely.
  • Installing surveillance software on your iPhone.

Identity theft

Once they access your personal information, a hacker could steal your identity. They might use your details to open new bank accounts, take out loans, or worse.

This can completely ruin your life and leave you with a mountain of debt that you weren’t responsible for—or, at the very least, cause tremendous stress and waste a lot of your time.

Financial fraud

If a hacker manages to steal information related to your finances, they commonly purchase items online using your information. They could also request money from your contacts or withdraw funds from your bank accounts.

Data theft

Hackers can make money by collecting data from multiple victims and then selling the information to others. Full ID packages can sell for hundreds of dollars each on the dark web, and hackers usually sell this data in large batches.

Blackmail

Hackers could use the data they’ve stolen to blackmail you. This tactic usually involves them threatening to share your personal photos, videos, or text messages with your contacts unless you send them money.

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If you're concerned that someone may have installed spyware on your iPhone, then run a quick scan using the award-winning Certo AntiSpy.

Its unique spyware detection engine means it can find more threats than any other iPhone security app.

How Easy Is It for Hackers to Spy on Your iPhone?

Contrary to what many people think, anyone can become a hacker with the right tools. Unfortunately, the spyware needed to hack an iPhone is cheap to purchase; hackers can access it for as little as $30 per month.

Hacking is no longer reserved for experts. These days, anyone who can use an iPhone can install data-stealing spyware. They only need access to your phone for a few minutes to download spying software onto your device.

Who can put spyware software on your iPhone?

A hacker could be anyone. They might be a jealous spouse, a nosy employer, or even a complete stranger, such as a professional hacker, stalker, or fraudster. It’s impossible to tell, especially since spyware is readily available and easy to use.

Most people, however, are far more likely to be hacked by someone they know. One survey suggested that 50% of Americans accessed their partner’s phone without their knowledge.

It’s also worth noting that if you have access to valuable data or are a high-profile individual, you may be more at risk of being hacked by a professional.

Types of iPhone Spyware

Hidden spy apps

Hidden spy apps are the most commonly used type of iPhone spyware.

They are designed to remain hidden on your iPhone and give hackers access to huge chunks of personal data, including instant messages, emails, real-time location, photos, and more.

This type of spyware program requires the hacker to have physical access to the victim’s device for a few minutes to install it.

Once installed, the hacker can then remotely monitor all activity on the infected device. Sometimes, they may even turn on the microphone and camera to listen and watch remotely.

iCloud attack

Hackers can also use iCloud spyware attacks to steal data from iPhones by targeting information stored in iCloud rather than the physical device.

This type of attack doesn’t require direct access to the iPhone, but does require the hacker to have the victim’s Apple ID login details. And because it is carried out via the internet, it can be very difficult to detect.

To protect against this, enable two-factor authentication on your Apple ID. This adds an extra layer of security, requiring both your password and a six-digit code to be sent to a trusted device, which makes unauthorized access much harder for hackers.

Rogue enterprise apps

Companies or large organizations typically use enterprise apps when they want to install custom apps on employees’ devices without going through the App Store.

However, hackers can also exploit this system to bypass the App Store’s security. To do this they create a rogue enterprise app with spying capabilities and distribute it directly to their target’s iPhones.

Although these apps aren’t fully hidden, attackers often disguise them with innocent names or hide them in folders to avoid detection. While they’re less intrusive than spy apps, they’re easier to install on various devices, making them a popular choice for attackers.

Misusing legitimate apps

Pre-installed apps such as ‘Find My iPhone’ and ‘Google Maps’ can be misused by hackers to track the victim’s location. This requires the hacker to gain access to the victim’s device to set up the tracking.

A hacker can also change the logged-in account on the device’s web browser to collect browsing data history and account login details.

As no malicious apps or code are installed, this type of attack can go unnoticed for months or even years, during which time the hacker has gained a wealth of information.

Zero-day exploits

Zero-day exploits are rare but can be devastating. Hackers use these attacks to exploit previously unknown operating system or app weaknesses, often without the device owner’s knowledge.

For instance, the Pegasus spyware uses zero-day exploits to infect iPhones and Android devices, enabling remote access to messages, cameras, and more without the victim’s awareness.

Once a weakness is exposed, hackers act quickly to exploit it. Millions of users can be affected when zero-day attacks target popular devices or apps. In some cases, advanced zero-day exploits, like those used in Pegasus, can infect a device remotely without physical access to the victim’s device.

hacker using spyhide to infect phones

Frequently Asked Questions (FAQs)

How does spyware get installed onto my iPhone?

Even though the iOS ecosystem is renowned for its security measures, spyware installation on an iPhone can occur through various means. Here are some common ways spyware can find its way onto your device:

  • Jailbroken devices that have an outdated or compromised operating system
  • Phishing attacks via malicious email, text messages, or social media
  • Insecure public Wi-Fi networks
  • Malicious apps that install spyware on an iPhone
  • Physical access if someone knows your passcode

What are the risks of having spyware installed on my iPhone?

Given the amount of sensitive personal information stored on your iPhone, spyware can be a significant threat. Here are the primary risks associated with spyware on your iPhone:

  • Personal data theft
  • Financial loss
  • Compromised privacy
  • Location tracking

How do I remove spyware from an iPhone?

Removing spyware from your iPhone is easy with Certo AntiSpy. Here are five easy steps to protect your phone:

  1. Install Certo AntiSpy on your computer
  2. Use a USB cable to connect your phone to your computer
  3. Run the scan
  4. Certo AntiSpy will detect iPhone spyware
  5. Click Remove to erase any spyware from your iPhone

You can also perform a factory reset to completely wipe your device, along with the spyware. Remember, a factory reset means losing all your data, so this step should only be taken as a last resort.

How do I protect myself from spyware?

Protecting yourself from spyware requires a combination of best practices, software solutions, and vigilance. Here’s how to shield yourself from cyber threats:

  • Run regular system scans with an antivirus app like Certo AntiSpy
  • Ensure your iOS runs on the latest version
  • Don’t install apps from third-party app stores
  • Take extra care if you have a jailbroken iPhone
  • Use a strong unlock passcode that only you know