I was able to give this a try, and IFly still isn't receiving anything from my Stratus 3i, even though I've done the switch to Open ADS-B mode. I've tried this on both my phone (Samsung Galaxy S9) and my tablet (Samsung Galaxy Tab A 8.0).
It says it connects to the Stratus wifi just fine. Are there some other Android settings that could interfere with the ADSB in? I've tried both Auto Detect, and selecting the Stratus III. It will only say "waiting for device".