The nine
Halves, quarters and the full screen.
Every shortcut holds ⌘ Command and ⌥ Option, so your hand finds them without looking. Each one fills the part of the screen it names and keeps clear of the menu bar and the Dock.
Out of sight
No Dock icon and no window to manage. Shnap opens at login and stays out of the menu bar until you want it there. Open it again from Spotlight for its settings.
One permission
Moving another app's window takes Accessibility, so Shnap asks for that and nothing else. It picks up the grant the moment you give it, with no relaunch.
Signed and notarized
Built with Developer ID by Nordser AS and checked by Apple, so it opens like any other Mac app. If macOS already uses one of the shortcuts, Shnap tells you in the menu bar.