Document Note: Q: How to use reader offline without internet connection
A: To use Reader offline, you need to open the Reader app or web app (read.readwise.io) while you still have an internet connection so all your content is fully synced and cached. On the web, keep read.readwise.io open before going offline or install Reader as a Chrome web app or wrapped Safari app to enable offline use. On mobile, open the app beforehand and open articles, EPUBs, or PDFs to cache images; Reader will then continue to function offline and sync any new changes once you reconnect.