I'm highlighting the Notes app but overall iOS 9 has made my iPhone 6 Plus much slower. I have the latest updates etc. What I'm specifically shocked about is Notes app. One click on the keyboard takes a second to appear on the display. If I type a 5 letter word I can watch the OS type my word out as I wait literally 5 seconds. It's brutal. Now I always try to use Notes app on my MacBook to avoid using it on my iPhone which is quite sad. Any ideas?