How does the LG Health app track climbing stairs

[AC Question]

Does anyone know how the health app tracks stair climbing? Mine says I've climbed 16 flights today and I don't remember doing that! I've also tested it at home where I've gone up the stairs, checked the app and it's just recorded it as normal walking.
I guessed it would be a mix of vibration and altitude tracking but that's just a guess. Anyone got any ideas?
It's frustrating because I wanted to set a stair climbing challenge.

 

[SheffieldChris]

No idea - I'm equally bemused as it fails to accept I'm climbing stairs.
I've been up at least 20 flights today but it won't shift off 1 flight, irrespective of whether I go up two steps at a time, fast or slow, two flights consecutively, etc.

Are you pinching mine ;-)