App: GammaDimmer • screen dimming
Developer: Alin Panaitiu
Genres: Utilities

Dim the brightness of all your screens without compromising color accuracy. 

Use handy sliders or keyboard shortcuts to keep the luminance of all your displays in sync.

Works with iPad Sidecar, DisplayLink and all external monitors:
• Dell
• LG
• Samsung
• BenQ
• Sceptre
• PRISM
• Xiaomi
• AOC
• Acer
• HP
• ASUS
• ViewSonic
• MSI
• USB Monitors

Notes:
  - Gamma Dimmer dims brightness by temporary altering the Gamma formula of the screen (or by placing a dark overlay where Gamma is not available)
  - It does NOT use DDC/CI to change the real hardware brightness of your monitors
  - The app can't listen for brightness keys because of the App Store sandbox, it instead uses the Fn-F1/F2 keys
  - The dimming goes away as soon as the app is quit

For adjusting the hardware brightness, volume or input of the monitor, check out my other "Lunar Pro" app on the official website.

Release notes:
• Fix Sonoma layout issues
• Try to restore last brightness after screen wake
• Adaptive dimming based on screen contents: only available when using a single screen