Have you consider an integration with SafeSky running on the same iPad that is open on Sydemon or from a smart phone via bluethoot ? 

Everything transferred via internet does have an unknown time component. There is no quality of service, neither for data even being transported, nor when it may be delivered. We often no longer notice because we got used to go brut force with so much bandwidth that latency does not matter. But things are different in the air. The mobile net is not meant for aircraft, still not, and I remember times when the provider cut your connection when they found out you were using internet in flight - as the tower could not handle the quick handover . and you had to call them and apologize later.