Have tried every which way to get WeatherFlow working with two computers, one tablet and one phone, none of which worked. All of them balked at Bluetooth even with the computers set up for Android.
Much to my regret, it looks like I shall have to buy a new phone with an up-to-date version of Bluetooth. This annoys me as I dislike planned obsolescence in equipment. My present phone is only about five years old and works perfectly well, still with a good battery. I don’t consider it useful to simply borrow a phone just to install the app because I would have no backup if, for any reason, I had to reinstall. GRRR!