Is there a method to download historical tracks, including altitudes flown? I am looking to upload tracks into Google Earth, OnX maps, or other popular mapping application to prove my appropriate and legal altitudes flown.
If and where you can find them probably changes depending on what device you are using. You might specify what device you're running iFly on. Include as much information as you can regarding the device name, model, series, version, etc.
In the Windows version I believe they can be found in the #Flight Trails folder.
Still Windows, these should be the files you're looking for. Looks like the file names are, at least partly, the date and time of the flight.
Looks pretty much the same. Open the SD card in File Manager, or whatever it's called now, and it looks almost exactly the same. You can open and read the .log files in Notepad. If you search elsewhere in this forum I'm pretty sure that people have listed at least one, probably more, sites that can read and display the flight tracks, some include altitude depictions as well.