Each license of TheTruthSpy purchased allows you to monitor up to 03 devices you own and provide your child or employee.
First, you can install it on your device yourself to test how it works first.
Second, you can install on target devices (your child or employee)...
Add the new device to your account: Install the software on your device, and you do authentication with your account (username and password). Then, you will install the software on that device you want to link and do an authentication.