Over the Youtube channel Ham Radio Crash Course Josh Nass gives a demo with the latest firmware and app for handheld (HT) radio VGC N76 (aka Btech UV-Pro and as a mobile version N7600).
It is important to note that these are not full duplex radios. The general rule is that you must here yourself on the downlink of the satellite in order not to cause interference. But the implementation of doppler control via an Android or IPhone app is kind of unique for amateur radio HTs.