Thanks for the great program, but I have some things I want to bring up:

It took me quite long (two lost excersises...) to realize that it apparently won't save anything without pushing the rec-button again after the excersise. And from that I think that apparently it also looses everythin if the battery gets empty during the excersise. I think I read that saving the data in some intervals is under construction, so thats good. As it is now, there is too much possibilities to end the workout in the way that nothing gets saved as there is no warnings or anything.

That is just a minor thing, but at least for me it wasn't really straightforward and that usually is bad usability design. It should be somehow better thought out. Also the REC starting the excersise is a bit odd, for me at least. Something like "Start excersising" (or Start, because of the space) would be much better.