This is a totally extraordinary app
This wonderful app just stays quietly in the background, saving text copies of the web pages you browse along with inline links to the images/graphics. You can set a time after which a page will be saved (e.g. if you spend more than 10 secs on a page). It's totally reliable, syncs between Mac and iOS devices, and is extremely space-efficient – I have something like 9000 entries in my History Book database, and they only take up a few megabytes. It's been invaluable for digging up references I'd failed to save elsewhere, and it's the first thing I would install on a new Apple device.