If I own an older copy of Notebook, are the latest updates free?

All Notebook 1.x updates will be free to previous owners of a Notebook 1.x version. Additionally, if you've already purchased Notebook and need to restore it back on to your device, you can re-download it from the App Store as long as you use the same Apple ID you used when you purchased it. The App Store will recognize that you've already purchased it and allow you to download it again.