Apps like Immersive Mode Manager

Here are some great alternatives to Immersive Mode Manager by Manuel Wrage :
One Button Navigation Bar
One Button Navigation Bar
★4.0
Immersive — Low-Level Immersiv
Immersive — Low-Level Immersiv
★3.7
Super Status Bar - Customize
Super Status Bar - Customize
★3.9
Fullscreen Immersive
Fullscreen Immersive
★3.5
Fulscrn Pro
Fulscrn Pro
★3.8
Back Button-No Root
Back Button-No Root
★4.8
Full Screen Browser
Full Screen Browser
★3.6
[Substratum] Samsung System Mo
[Substratum] Samsung System Mo
★3.5
Navigation bar remover/activat
Navigation bar remover/activat
★4.4
Simple Navigation Bar - Floati
Simple Navigation Bar - Floati
★4.0
Transparent iOS X - Status Bar
Transparent iOS X - Status Bar
★4.0
Colorful Custom Navigation Bar
Colorful Custom Navigation Bar
★4.2
MIUI-ify: Custom Notifications
MIUI-ify: Custom Notifications
★3.8
Navigation Bar - Back , Recent
Navigation Bar - Back , Recent
★3.9
Navigation Bar for Android
Navigation Bar for Android
★4.0
Internet Speed Meter & Monitor
Internet Speed Meter & Monitor
★3.9