Version 9.0 provides full support for iOS’s Dynamic Type (i.e., scalable text). Users who have difficulty reading small text on their device can increase the size of text, while other users who prefer to cram as much onto their screen as possible can decrease the size of text. Users indicate the desired size of text on their iPhone/iPad using the iOS Settings app (look under “Display & Brightness”, then “Text Size”).
As always, this new version also contains various bug fixes and optimizations.