GET THE CREDIT YOU DESERVE!!
Ever go for a walk and forget your phone?? Ever go for a run only to have your phone not record all the distance that you ran/walked?
Retro-fit is the app for you. It allows you to enter a distance. It also allows you to enter a distance and the app will calculate the difference and record it. In addition, it saves the adjustment factor, to ease any future adjustments.
Retro-fit is integrated with Apples Heath App and Apples HeathKit interface to retrieve existing exercise information and lets you enter new entries to adjust that information.