Note 4 Baramoter Q/A topic

Hi,

I was surprised to find a barometer in my Note 4 :D Lif is full of surprises.

Qs:
1) Is there a stock app for this? I couldn't find it.
2) I found some apps in the Google Play and some of them have Altitude and Sensor calibration. Will it calibrate my device or just deviations within application?
3) How accurate is this barometer? Has anybody ran some pro tests?
4) What popular apps can use data collected with Note 4 barometer? Seems that Endomondo doesn't collect barometer data. Maybe some other apps?

Thanks!!!