I want to upgrade my dad from his HTC One M7 to an iPhone 6s without him losing anything. Problem is he's in a different state (geographically speaking). In the past I was able to use HTC's migration tool to go from one HTC to another without any issues; the software was reliable enough that he could run it and get everything. Has anyone actually used this new app going from Android to iOS and have it work without any issues? I can't seem to find much information about it.