Hi M_Stein,
It may be impossible to make the app with subscription , but you could set In-app purchase(Add-on) in your app to sell content or new app functionality to be purchased one time(Durable Add-on) or charged at recurring intervals(Subscription Add-on).By the
way, I advise you to use the new namespace Windows.Services.Store not the old one Windows.ApplicationModel.Store. You can refer to
In-app purchases and trials to get how to implement the Add-on in your app and
Add-on submissions to submit it in the dashboard.
Best regards
Daisy Tian
MSDN Community Support
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