In reply to Morten Rand-Hendriksen.

It's interesting to see the difference between Google and Apple's recommended best practices for design guidelines.

Apple has always advocated for the primary navigation bar to be on the bottom of the app, so it's easier to navigate with a single handle... with your thumb. Google has went the other way and in Material UI places the primary toolbar on the top. Given so many mobile phones are so large these days, I wonder how things shook out the way they did.

From a personal UX standpoint I definitely prefer the primary navigation bar on the bottom the way Apple's own apps do it, as well as Facebook, Twitter, and the WordPress app on iOS precisely because it's easier to navigate without having to adjust how i'm holding the device naturally, or having to hold it in one hand and navigate it with the other.

It's in line with Google's Material UI design guidelines, but I definitely prefer Apple's design guidelines when it comes to this specific element placement.