Does one NotePlan 2 purchase work on all my devices?

NotePlan 2 is sold as a one-time purchase separately for iOS and Mac. This means if you purchased NotePlan 2 on your iPhone or iPad, and you want to use it on your Mac as well, you need to purchase it on the Mac AppStore separately. All devices will be synchronized using iCloud Drive.

The purchases are separate, so customers who have only an iPhone or iPad, but no Mac or vice-versa can save money by purchasing only one platform. Furthermore, the development of the Mac version is considerably more demanding for us.

NotePlan 3, however, is activated on all platforms (iPhone, iPad and Mac) with a single subscription. See here how you can activate your subscription on other devices.