The app only starts searching for a GPS link AFTER the exercise has started. This causes the reported distance to differ each time I use the app, even though I have walked the exact same route at the same pace for the past 2 1/2 years. Sometimes it takes up to 40 seconds to find a strong GPS signal, and in that time the app measures time but not distance. This was not always so, the GPS was initially linked before the exercise started, but some "genius" then changed it to after the exercise commenced. Until this is changed, the app will remain terrible.