It's not so much that you can use it offline (though that's one benefit) but rather that it caches your assets so if there's very, very slow connection you can

It's not so much that you can use it offline (though that's one benefit) but rather that it caches your assets so if there's very, very slow connection you can still use and read content. If it's something that requires the Internet to work, it can show a "no connection available" message but it still load, similar to a native app. The goal is to avoid the "white screen of death" you get when a web app won't load. Here's the canonical example: http://www.pocketjavascript.com/blog/2015/11/23/introducing-pokedex-org http://www.pocketjavascript.com/blog/2015/11/23/introducing-...