What is stalkerware, and how is it used by stalkers?

Stalkerware is a type of spyware designed to secretly monitor someone’s activity on their phone or computer. It can track location, read texts and emails, listen to calls, record keystrokes, and access photos or social media without the victim’s knowledge. Stalkers—often abusive partners or exes—use it to control, intimidate, or spy on their targets. Unlike corporate spyware, stalkerware is marketed for personal use and can be installed quickly if someone has physical access to a device. It’s invasive, dangerous, and often illegal, and many cybersecurity tools now flag it as a threat.