Stalkerware: The hidden app that knows everything you do and where you go

Have you ever had the feeling that someone knows too much about you? Maybe a jealous partner knows exactly where you went for coffee, even though you didn't tell them. Or maybe your phone is heating up in your pocket for no reason. Unfortunately, it's not just paranoia.

There is a category of programs called Stalkerware (tracking software). These are not installed by unknown hackers from other countries, but often by people you know. At Altanet Craiova we believe that your privacy is sacred, so we teach you how to detect these digital spies.

What is Stalkerware and who installs it?

Stalkerware is commercial software, sometimes sold under the guise of “parental control” or “employee monitoring.” In reality, it is used to spy on adults’ lives without their consent.

Unlike classic viruses that come via email, Stalkerware usually requires physical access to your phone. Someone takes your phone while you're in the shower, unlocks it (if they know the PIN), and installs the app within minutes. The app then becomes invisible on your screen, but sends everything to the spy.

What can a spy see?

Once installed, this program has full access. It can monitor:

• Your exact location: Via GPS, in real time.
• Private messages: SMS, WhatsApp, Messenger (even deleted ones).
• Photos: Access to the photo gallery and sometimes even activating the microphone to listen to what you're saying in the room.

Signs that your phone is betraying you

Because the application is hidden, you need to pay attention to the symptoms of the "disease":

• The battery is dying: Spying uses a lot of energy. If the battery used to last a day and now lasts 4 hours, that's a sign.
• High data usage: Check your phone's settings to see how much data your phone is using. If you see a huge data usage when you're not on YouTube, something is sending information in the background.
• The phone is hot: If it's hot even when it's sitting on the table, the processor is working hard on something hidden.

How do you get rid of the uninvited guest?

If you suspect you have Stalkerware, don't rush to delete it right away, as the person stalking you will receive a notification that the app has been stopped. This can lead to conflicts.

Here are the sure steps:

• Change all passwords: But do this from another device (your work laptop or a friend's phone), not from the infected phone.
• Factory reset: This is the only 100% safe method. This will erase everything on your phone, including the virus. Make sure you have backed up any important photos first.
• Secure physical access: Set a complex PIN code or use fingerprint/FaceID. Don't let anyone know your unlock code.

For resources and specialized help in case of digital domestic abuse, you can consult the global organization Coalition Against Stalkerware.

Conclusion

Your phone should be a safe, not an open microphone. Be mindful of who has physical access to your device and don't ignore signs of poor performance.

Do you need a professional device scan or do you want to secure your home network? Our team offers you IT services for virus removal and consulting. Visit our contact page to schedule an appointment.

This material is part of Altanet's educational series on digital security. Want to know what other risks you are exposed to this year? See Complete list of cyber threats in 2026.