The Spy App is an application that will be installed on Android devices or iDevice (iPhone, iPad,...) to track all data such as GPS location, SMS conversations, Call History, Whatsapp messages, Photo, Ambient Voice Recording, Phone Call Recording...
So far there are 75+ features.
The Spy App can work on a computer/laptop with MAC OS, Windows OS. Please go to the top root session you will see 2 sessions: The Spy App (on smartphones) and The Spy app (on the computer).
Please read more about what is The Spy App, what are the purposes on Get Started session: