If developing complex solutions as SPFx Teams Personal Apps, the top header that contains a tab with the name of the app is useless and uses screen real estate without bringing any functionality.
Further more, if you have custom navigation in your app, it becomes cumbersome.
I would like the option to hide it and have my personal app, with my custom navigation, occupy the whole available space.

https://user-images.githubusercontent.com/30260770/84480200-db291600-ac9c-11ea-8c72-eb9cbb9a5374.png