I want to make a single Windows Store app and it will be a Windows Phone app, and I want to deploy it on Store and it should support all 3 platforms for Windows Phone. i.e, Windows Phone 8, 8.1 and 10.
So my question is that can I just make one app on Windows Phone 8 and then some how deploy it so it is available on all 3 platforms? Windows Phone 8, 8.1 and 10? or is there a seperate store for Windows 8 and 8.1 ? I've been developing Windows 10 uwp apps for sometime so I know all about that but I don't know much about Windows 8 and 8.1.
Also my app will support EAN/barcode scanner for items and some http requests for some jata in JSON format. So keeping this in mind I need to know whether I need to create 3 separate apps, or 2 separate apps or just one app?
Note: the app only needs to support all Windows Phone devices, the desktop version or Hologram, Xbox etc are not needed at all.
If you create a Windows Phone 8 Silverlight app, it will work on Windows Phone 8, 8.1 and 10.