Will the radar animate within ForeFlight using an ADS-B receiver?

ForeFlight will play an animated radar loop when using an ADS-B receiver, but it takes time to get enough "frames" to be able to animate. When retrieving weather information over the internet, frames are retrieved from time past to present, but with ADS-B weather, frames are loaded from the present and then forward in time. 

You will need to open ForeFlight Mobile and select the Radar layer on the Maps page to get the radar data. As new ADS-B radar frames are received every 5-15 minutes, you should see the length of the animation loop increase up to a maximum of 30 minutes.