Today, I installed XCSoar on my tablet, because I think controlling of the radio via tablet is very convinient.XCSoar has an implemention for this feature.
I like to use skydemon for when flying with a motor, but Xcsoar is capable of controlling the radio. So, currently I am unsure what to use.
If this feature was more known, I am sure everyone will like it.
The biggest issue is the complicated installation and configuration of the RS232 connection.
You will need a BT -> RS232 Adapter or something like that.