Spyware is software that secretly or deceptively collects information about a device, account, location, communication, or user activity. It may steal credentials, record screens, monitor messages, track location, or send data to another person.
Spyware on phones
Spyware may arrive as a fake app, modified APK, malicious attachment, or software installed by someone with physical access. Some stalkerware products hide their icon or use broad Accessibility, location, notification, microphone, or device-administration access.
A monitoring app used without appropriate knowledge and authorization can create safety and legal concerns even when the software is marketed as parental or employee supervision.
Possible signs
Unexpected permission changes, unfamiliar administrators, persistent location access, unusual data use, rapid battery drain, and settings that cannot be changed deserve review. These symptoms have ordinary causes too, so inspect installed apps and access rather than relying on one sign.
What to do
If monitoring may involve an abusive partner or another safety threat, use a different device to seek help before removing the app. Removal can alert the person monitoring the phone. The National Domestic Violence Hotline provides U.S. safety resources.
For an ordinary malware incident, revoke powerful access, remove the app, update, and scan. Change credentials from a clean device and review accounts.
Spyware and tracking are not always the same
Legitimate apps can collect analytics or location with consent. Spyware hides, misrepresents, or exceeds appropriate access. Review the purpose, disclosure, and control available to the user.