Keeping Your Notes Together on iOS & OSX

Notability is my preferred app for note-taking on my iOS and OSX devices. The app supports normal typed text, images and handwritten notes. And if that's not enough, you can also record audio notes at the same time if need be. You can keep your data synced and backed up by utilizing Apple's iCloud service but I like to have more redundancy so I backup my data to DropBox as well.