Why does my Track Log indicate it was recorded with my iOS device when I was connected to an external GPS?

ForeFlight Track Log records the GPS source that was connected when the Track Log began. Since Track Log can start recording up to 30 minutes before it detects a takeoff, this GPS source is often the iOS device. If you connect to an external GPS, ForeFlight will use the GPS data from your external device to record the Track Log however the Track Log will still indicate the first GPS source.