I just use my gps while biking - I can get it a bike mount, but I'd worry about it there. So it just goes in my pack or seat bag. It tracks my path, my speed, and distance. If I have some readout on my handlebars telling me what i"m doing, I find it a bit distracting and spend a bit too much time looking at it instead of just riding, so having it in a bag is fine.

It doesn't give cadence, I'm not overly bothered about that.

And I use the gps hiking or kayaking, as well..