I'm in no way connected to the company but, in my humble opinion, Skydemon is a fantastic bit of kit and worth every penny.
I think some people would prefer us to all live in mud huts rather than progress with technology!
But from personal experience, I'd always have a route planned on a chart, just in case the device your running it on packs up! I've run SD on both Samsung and Apple devices. It seems to run a bit smoother on Apple but wasn't bad on Samsung either.