Name: Running Power Estimator
Rating: 4.6 (58 reviews)
Author: tmatthey71

A running power estimator using pace and gradient based on Manetti et. al. (https://www.ncbi.nlm.nih.gov/pubmed/12183501). The running power is saved to FIT. Note that GPS-calculated elevation may have major distortion and affecting Run Power results. The vertical oscillation is not considers like with the Stryd sensor, only the horizontal power.  

Example: Running 95 minutes and burning 1400cal. 1400 * 4184 / (90 * 60) gives an average of 1084.7 Watt .

Settings:

In general: keep the defaults if you are not familiar with setting topic 

Efficiency: Setting to 20-24% gives you approximately similar power out as for cycling, where as 100% is the energy you burn during running. 

Averaging time interval of pace [s]: The time interval of paces to be averaged. Shorter time will give more updates, but with a greater chance of variation.

Distance frequency [m]: The distance for the grade to be calculated. Shorter distances will give more updates, but with a greater chance of variation.

Review:
https://www.prorun.nl/runtech/vermogensmeters/hardloopvermogensmeters-13-running-power-estimator-iq-app/