The launcher icon does nothing useful! Don't open it if you read this! This app works through the use of a custom Quick Tile. Add the tile by opening the notification shade all the way, tapping the pencil or "EDIT," and dragging "Hide Notch" to the active area. Check the "Promo" video for a visual guide, or follow this link: https://youtu.be/HhH5wK1NokY
Some apps, like Google Calendar and Instagram, cause the status bar icons to turn dark gray or black, effectively hiding them when Nacho Notch is activated. This likely cannot be fixed! I'm working hard on finding a solution, but there isn't much hope.
ZENFONE 5 USERS:
After installing, if the tile doesn't show up in your quick settings menu, reboot. This is a ZenUI bug!
Maybe you have a phone with a notch, maybe you don't. If you do, you might also be annoyed by having this black blob in the middle of a light-colored status bar most of the time.
If this description fits you, you probably want this app. Nacho Notch colors the status bar black while the device is in the portrait orientation, making it better fit with the notch (thereby "hiding" it).
Even if you don't have a notch, but still want a black status bar, you can use the app too. It dynamically finds the height of your statusbar, so you won't be dealing with too little or too much height, or finnicky manual sizing.
Icon color force option by Lee Shawn
Idea by Mishaal Rahman of XDA Developers (article: https://www.xda-developers.com/hide-notch-huawei-p20-essential-phone-oneplus-6-asus-zenfone-5)