It will affect your distance data via Phone GPS but the data recording gets logged into the frontier device. THe current problem I see with the Frontier X2 is that relying on GPS data for distance is very inaccurate, Hence, I use stryd to log my distance and then I combine the files to get an accurate display of my data.. *****Attention Fourth…Read More

You get to set 2 alerts manually, you can choose between heart rate, breathing rate and cardiac strain. One will vibrate once the other will double vibrate. I personally choose heart rate and cardiac strain.. regarding your age and health condition that’s a conversation best had with your cardiologist.. has your cardiologist what your limits…Read More

I suspect that the x2 picks up AFl, as the following shows ie what looks like the atrium beating approx 4 times for each ventricular beat ie