Step 7: Check App Reviews and Install Updates
If you haven't done this already, now would be a great time to update your apps, assuming the latest bug fix update has good reviews on the App Store.
Developers have been rolling out iOS 9 support updates at a pretty steady pace. Those iOS 9 support updates are going to be crucial for those of you moving up from iOS 8.4.1 or below. They'll help make the transition to iOS 9.0.2 smooth.
Just make sure you check app reviews before you make your move. While most iOS 9 support updates should be fine, others might be causing problems.