Abusers can use relatively inexpensive software to spy on your phone, giving them access to your text messages, call history and even GPS location. Some spy software goes so far as to turn your camera on in “stealth mode,” recording your movements and conversations. If your abuser knows where you are, who you’re talking to and what you’re talking about, he could have installed this software on your phone
Abusers can buy software that track every keystroke you make on your computer, giving them access to your emails, Internet history and passwords. They can also relatively easily check your browser history to see which sites you’ve been visiting.