Great app! I liked it once I got to use/understand it, but I definitely want to make some suggestions:

I would suggest that you look into using joyride/introjs to give a user an idea of how to use the app, and what it is...

I eventually figured out what it was and how to use it, and by that time I thought it was pretty cool (I like how the sparkline is on the left hand side) -- but it took far too long to find out what it was/how to use it...