If I have multiple devices providing ADS-B, GPS, or AHRS data, which device's data is used?

ADS-B

If you have two ADS-B receivers connected simultaneously, they will compete within ForeFlight, which may lead to traffic or weather information errors. Therefore, you should only have one ADS-B receiver connected to ForeFlight at any one time.  

 

GPS

When GPS data is provided by multiple connected devices, ForeFlight Mobile will default to the panel mount GPS data source, following a predetermined hierarchy to utilize the most accurate GPS source. If the primary GPS source is lost, the app will fall back to use the next best option based on a predetermined hierarchy.

 

AHRS

When AHRS data is provided by multiple connected devices, ForeFlight Mobile will default to the panel mount AHRS data source, following a predetermined hierarchy to utilize the most accurate AHRS source. If the primary AHRS source is lost, the app will fall back to use the next best option based on a predetermined hierarchy.