Pay again for Mac - iOS - Android app but I already have one

The Apps have required specific development on both platforms, with three different teams working on each.
Indeed, the user experience on an Android device vs. an iOS device vs. a desktop must be designed in a different manner so that we optimize usability for our users.
This is why there are three different apps on the Play Store, App Store, and Mac App Store.
Note that there is no hidden cost - by purchasing our Apps, you have all features available!