The need for physical access for installation depends on the type of phone you are looking for to monitor.
For iPhone (No physical access required):
Enter the Apple ID and password for the phone whose data you want to view.
The software will then take care of the data itself.
Log in to your App account (on your own device) to ensure that the app is working.
For Android smartphones (physical access required):
You will only need a few minutes to install on your device.
Click the link on the target device, follow the on-screen instructions to instantly install the phone tracker on your phone.
If you have any problems with the installation, you can always contact your application's customer support team for help.