Name: Tacho
Rating: 3 (3 reviews)
Author: TomaszKorzec

All important information in a single data field.

Header: battery status, time, GPS signal strength

Upper third: total descent (in m), total ascent (in m), current speed (in km/h) with indicators for max (purple) and average (blue) speed.

Center: elapsed time, heading-direction, elapsed distance (in km)

Bottom half:  Four bars with the recent history. On the x-axis, each pixel corresponds to 10m.

1) Cadence (in rpm) with average on the left and current value on the right. The colors change from blue to red when the cadence goes from low to high.

2) Heart-rate (in bpm) with average on the left and current value on the right. The colors correspond to heart-rate zones from the user profile.

3) Altitude (in m) with the current gradient (in %) on the left and the current value  on the right. The colors correspond to the gradient with blue to green to red, when the gradient goes from negative to neutral to positive.

4) Power (in W) with the average on the left and the current value on the right. The colors correspond to power zones, that can be specified via the app settings. If no power-meter is connected a virtual-power is computed, based on other sensors and constants, that can be adjusted via the app settings. 

Restrictions: everything is metric. The virtual power estimation could be improved. The power-meter based power is completely untested. A 1-data-field layout is needed.