The App seems to be geared more to the newer OSs.
Initially I would have said the Android version was better behaved but since the Apple app was ready before Android I'm not sure anymore.
Just like Windows versions newer Phone OS versions drop things while adding others. Since Android and IOS versions change each year with new phones, things that behave now may not in the future.
Also new options added to the WM100 may not work with older phones
During testing my new phone didn't work well with the app and WM100. Prior to release an Apple phone worked better then my Android.