Hello, so I can only answer briefly for the Apple Store...I see the app "Samsung Gear 360" still in the Apple Store --> https://apps.apple.com/de... (I still installed the app and quickly tested it and it still runs great) and also in the Google Play Store I see a "Gear 360 File Access & Stitcher" --> https://play.google.com/store... . However, support for the app has been discontinued since August 2020 and is officially only supported up to iOS 13.0. I am currently still on iOS 14.8 and it may well be that the app no longer works with iOS 15 :-(.