Fat & carbs burnt (rate and total)

Estimates the amount (and rate) of fat and carbs burnt during an activity - keep aware and avoid bonking, or calculate weight loss. If you appreciate my work, please tip me at http://www.paypal.me/LiborOnTrails Based on the caloric output from Garmin's Firstbeat algorithm and the percentage of fat / carbs burn rate depending on the user's current personal heart rate zone. Zone 1,2: 85% fat, 10% carbs; Zone 3: 50% fat, 50% carbs; Zone 4: 15% fat, 85% carbs; Zone 5: 10% fat, 90% carbs.

v1.0.9: adjust vertical position to avoid lower numbers cropping v1.0.7: adjust lateral spacing programatically across all devices! v1.0.6: adjust lateral spacing for Edge devices v1.0.5: make labels and values white when black background is used v1.0.4: improve layout for most devices v1.0.3: fix another potential division by zero due to integer division v1.0.2: fix the bug of a potential division by zero