Until iOS 9, we were able to use
Ok, so to recap.
Currently, the only way to handle my scenario, is to assign a specific scheme per app in an orderly fashion, for example:
my.domain.app01 my.domain.app02 ...
If you have apps already released, just update them to add a new, additional scheme.
Now in Info.plist file, you will have to add all of your existing and future schemes to
LSApplicationQueriesSchemes list in Info.plist.
The idea is: even though you have 10 apps released, you add entries for let's say 40. This way, you will not have to update your app to add schemes for future apps, they will already be there and you will be able to detect them.
This of course covers my scenario, where I want to be able to detect my own apps and make use of them.
Remember, that your app can handle more than one scheme, so you can assign the internal scheme + use something better named to allow external access to your app.