Total rubbish! App has worked intermittently all season. Never ever records a complete day on the mountain and sometimes not at all. Always misses lifts, sometimes completely over counts vertical. For those of us who have used app for years and loved monitoring our activity, this year has been a disaster. I'm now locked out of the app. Happened halfway through skiing in Vail this week. Inaccurate record of activity at lunchtime and no record at all by end of day. Hate it. Have tried uninstalling