That sounds almost exactly like the functionality that Firefox' Pocket provides. The app downloads a reader view of everything you put in there so you can read offline.
Pocket sometimes fails to save the article locally, and forces 'Web View', rendering it useless unless loaded with a data connection.
I feel like Pocket could use some updates, it seems underloved from the Mozilla team, especially for an app that purportedly generates revenue for the company.
I feel like Pocket could use some updates, it seems underloved from the Mozilla team, especially for an app that purportedly generates revenue for the company.