Gents, I do not mean to sound flippant or off topic, but my technique to losing the App is to revert to a back-up paper chart - I always have one in the plane, especially around where I fly, which is littered with SUA's, TFR's, RAs, SFRA's, FRZ's, blah, blah, blah....
There is just too much that can go wrong with computer systems, apps, programs, etc. for me NOT to take a $7.00 chart with me, even it goes a little obsolete.
I really lamented the day they ended WAC charts, as those covered HUGE amounts of area - but alas, they are gone....
Anyway, I don't think there will ever come a day where I don't carry along some basic VFR charts....sorry if I seem old fashioned, but just too much scar-tissue from failed avionics over the years...
Most of the time they just sit there as IFly has never failed me, but I like my computer a lot more when I am not totally dependent upon it!
Mike, N714AJ