Does the app require internet access during recording?

You don't need internet or mobile data for tracking! At the end of the day, you can upload the track at your leisure in your hotel and have it analysed. Until then, the track is stored for you under ‘unsent tracks’.
As soon as you have internet access, you can go to the folder and upload the track manually!

However, you do need internet access to use live data such as weather and SkiMap.