On the 20th of September Apple released iOS15, their latest operating system for iOS devices (iPad, iPhone). We’ve completed extensive testing with iOS15 on a range of devices and have discovered no issues with the current 8.1.11 release of AvPlan EFB.
Given the above, we still recommend caution when upgrading devices to the latest iOS release. Upgrade non critical devices at a non critical time (ie, not before getting in the aircraft to fly across the country). After a number of days or more, upgrade more important or primary devices.