We don't currently have a version of Airstory works that when there's no internet connection (e.g., on an airplane).
If you're working in Airstory and you temporarily lose your connection, any edits to your document will be saved on our servers once the connection is restored, providing you don't leave the tab you're working in.
Our team is planning to build an offline version of Airstory. Keep any eye out for an announcement in the near future.
We hope you enjoy using Airstory! 👍