Vesper, the iPhone app designed to help you collect your thoughts, has been updated with adaptive interface support for both the bigger iPhone 6 and the much bigger iPhone 6 Plus. They've also taken advantages of fixes Apple has made to the way text is rendered in iOS 8. From the Vesper blog

There are a number of technical details that Brent can clarify, but the bottom line is that UITextView on iOS 7 had a number of significant technical problems. iOS 8 brings fixes for most of them, which allowed us to work around the rest fairly reliably. If you find any lingering problems, please let us know.

Bottom line, Vesper should look great on those fresh big screens when you start to get them tomorrow.