In order to synchronize our app with devices, fitness trackers and other apps, you can use the Health app from Apple. This way it is possible to import data from Withings, Runtastic and others. Currently this option is only available for the iPhone, but we will soon support Google Fit as well.
With providers such as Garmin or Fitbit, which don't support this option, there is currently no data exchange possible. However, we already work on a direct connection, so you will be able to synchronize your data.