We currently only support automatic import of your running data from your Strava account, if you have connected it to your 100 Days of Running account. For any other running apps (like Endomondo, Runkeeper, Garmin Connect, TomTom Sports, etc), you will be required to manually submit the run data via a public GPS activity link of your run (unless you have setup automatic sync of your app run data to your Strava account), which must have the following details of your run:
Pace
Distance
Km/mile splits,
Publicly visible to everyone
If your submitted link does not meet these conditions, the data will not be considered valid and will be rejected/removed.