I use ForeFlight on an iPad Mini with a Dual 160. After "upgrading" to iOS 8.3, I had the same problem so many are having with the GPS and ForeFlight not playing nice with each other.
I just successfully downgraded to iOS 8.2 and everything is working normally again between the ForeFlight and the Dual 160. Here's the link I used.
http://www.idigitaltimes.com/downgra...or-ipod-433654
It's a fairly straightforward 3-step process, though the download kept stopping, saying I didn't have an internet connection. Not sure if that was a problem on their end or AT&T's (I have U-Verse). It took several restarts of the download before I had the entire file.
I had a few anxious moments where I thought the installation had stalled. But the blood is flowing red again, and I don't think there's any permanent damage from the oxygen deprivation due to me holding my breath.
After the installation of 8.2, my ForeFlight wasn't showing in it's usual spot, so I attempted to reinstall. That DID hang-up. I ended up deleting ForeFlight and re-re-installing. Now it's reloading all my charts.
Bottom line: it looks like everything is ready for flying again.
Of course, use this info at your own risk.