The recommended way to do this is to Set the Gate to Split or Finish mode and set your SplitFast App to Race training Mode. Place your iPhone a distance away from the Gate that you would like to use as the detection boundary. Then start a Trial and walk through the Gate. Do this with different Proximity Settings until you can walk through the gate undetected (the trial will not record your gate event). Then place your phone close to the Gate and run another trial to make sure the iPhone does detect the gate event.