Ergonomics make the user experience much better. The older app design had actions at both the top and bottom of the screen, which made it harder to use because your fingers had to cross the screen back and forth.
Lyft Re-design Case Study
Jessie Chen
6698

Uber has the exact same problem, or I should say a lot of apps in iOS 9 have this issue. Some of iOS10's redesigns in Maps, Apple Music presented a great to move frequent controls to the bottom of the screen and use swipes to expand/hide menu. Looks like this going to be a huge trend.

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