Today, iOS 8 is being unleashed on the world. We have been busy testing iOS 8 (including over 7 hours airborne in the past week) and have found only one minor issue with the current AvPlan EFB Release (4.0.2). We have found a problem where an alternate cannot be added to the flight plan. This will be addressed in an app update shortly.
All other features appear to work as they did previously. However, as always we recommend that you update your devices one at a time so that any unintended consequences of the upgrade to not affect all your devices.