How to spy on WhatsApp?

To spy WhatsApp, you need to use a WhatsApp tracker. It might be an SMS tracker, spyware, spy application or parental control with WhatsApp feature. When you find a convenient application, you choose the subscription plan and the package which contains WhatsApp as a monitoring feature. The next steps are to buy it and install on the target device. After the installation, a user may start spying on WhatsApp chats of another person.