Qeys

Qeys.io allows you to generate unique license keys for applications you made, and offers you a three line solution (in combination with a 0.8KB JavaScript file) into protecting your applications from being copied. Invalid use will be reported to you by e-mail, and further access to the application is prevented by showing a custom Access denied message. This gives them full access to your code, introducing the risk of them copying it and using it in a way they were not supposed to. And since the price they paid covers only one copy of the application, you are going to prevent this from happening. Now.