MIKE:
I have mentioned the jerky movements on my Android tablet that would preclude accuracy approaches.
We need to get an AHRS input to work with IFLY on our Android devices.
That said, if I had an engine failure when above a solid undercast I feel confident that I could safely descend through the undercast using my Dynon attitude indicator AND synth vis to keep me off the rocks until below the undercast.
My Avid Flyer MK4 is ADSB equipped with Uavionix ECHO UAT and SKY FIX. However, there is no AHRS from that system.
With a check pilot on board, I have made approaches to my field to below minimums by just using my IFLY location on my tablet along with my Dynon attitude display and altimeter. and rate of descent. When I hear IFLY say "500" I look up and continue VFR touchdown.
John M