Calories calculator

Hi Orux
up to now I used different tools when doing sports like hiking or biking for
measuring speed and distance a tachometer
measuring elevation a barometric meter
measuring calories a heart rate watch.
Now I have aPolar heart rate belt and would like to substitut my watch by Oruxmaps completely. Is there a chance to integrate an algorithm for simple calories calculation like those included in many watches?
I know there is the possibility of uploading, but I dont like to put these data into the Internet! Otherwise I would like to see the results immediately and offline.

Looking forward this new feature