Bottom nav bars. Between the time of Gingerbread and Marshmallow, they seemed to become significantly less prevalent on Android (or maybe I was just able to avoid more of them), with many developers and designers going for other navigation models. But those other nav models - specifically the hamburger menu - aren't always ideal. Often, teams worry that items in the drawer are "hidden" from users. Sometimes immediate visibility and total obscurity seem like the only two realistic options.
To be fair, it's true that ensuring users see these options each and every time they open the app tends to increase usage. And while the situation isn't so dire, it makes sense to have official guidance on popular navigation patterns.Read More