I have apps on the app storethat i purchased, which are now no longer available,but i can still download them for now.. Currently, these apps still work on IOS 10.x but moving forward, this would also prevent me from staying up to day because i wouldn't know if these apps would break i like (by "like" i mean there is no alternates that i would feel better at). If i DID upgrade iOS in future, can i be 100% sure i can downgrade within 24 hours (eg Apple still signs), and if so, where would u get the old version? As Apple would restore to latest version... I need to know if anyone has done this it actually does work, otherwise i will just stick with what i have.