Yes, I would prefer both on Apple. But presently I'm using a iPad 3 (IOS9) which Gaia supports but Avenza doesn't (they're 10). I could use both on the Android 6 tablet I have, but prefer Apple, especially the devices. I probably will break down and upgrade to a newer Apple tablet, but I'm just being stubborn (happens when you get old!). Plus it gives me practice on a Android system. Additionally, I venture to some pretty remote areas for a few days at a time, mostly solo. Having a backup system gives me a little more peace of mind, as Apple can at times (only once for me though) develop some GPS quirks that require a network reset. Of course it makes my Subaru Crosstrek or Jeep Wrangler (TJ) interiors look like a police cruiser with all the damn devices mounted (:.