Darker can lower your screen brightness to extremely low levels, to help prevent eyestrain during the night. Use the built-in color filter* to adjust the color of your display, perfect for filtering out harsh white backgrounds during the night. This app is fully functional and does not include advertisements. Additional paid features are unlockable through an In-app purchase. Xiaomi device / MIUI users need to go to Settings → Installed apps → Darker → Other permissions, and enable "Display pop-up window" for Darker to work correctly. Paid features include: » Auto-On & Auto-Off » Start ...