Improve recorder app for runners

records just gives you an idea of the size of the file (I guess we could just give a size in bytes?). A 10 minute file with 1/sec recording will be bigger than a 1 hour file with 1/10 sec recording so it feels important.

Adjusting the speed value to a better metric should be pretty easy...

• Actual distance travelled?
  
• Heart rate zones (graph showing how long HR was in each of 3 zones)
  
  

The data is calculated from the recorded file when you view it in the app, so in a way there's little point storing it (apart from to save a few seconds calculating).

In the other thread I was talking about saving the stats that are displayed in the Run app. They could also just be calculated from recorded data though...