In case you want to upgrade from a Monthly subscription to a Yearly one (or to a Lifetime license) go to Paper’s page in the App Store and press the rounded button with the price next to the Yearly subscription option (or next to the Lifetime in-app purchase).
Both the subscription and the one-time purchase unlock Pro Features on all your iPhones and iPads that share the same Apple ID.
Pro Features is either a subscription or a one-time purchase.
· In the document editor: Tap the title of the document in the top bar then tap the round "Share" button in the popup.
This subscription (or one-time purchase) applies only to iPhones and iPads.