I can not understand what does "Active Users" actualy means.
- Does it means each device, which having installed the application ?
- The application will do only require the push notification API.
about 6 years ago
An active user is defined as any user (see explicit versus implicit in the documentation) that makes an API call in the calendar month. If you're using explicit registration, it is per account, if you're using implicit, as a rule of thumb you can think of it as per device.