11pm, and your screen is still set for noon.
Placeholder — the beat about eyes adjusting, then aching.
Windows · free for personal use
Your screen should know it's evening.
Placeholder lede. Real hardware brightness over DDC/CI, driven by the sun's position where you are — bright while it's up, dim by the evening, and you never touch a slider.
Version · size · Windows 10 and 11 · no account, no telemetry
The problem
Monitors don't know what time it is.
Placeholder — three beats, then the turn into what the app does instead.
Night Light warms the colour and leaves the light alone.
Placeholder — a warmer picture over a backlight still running at full power. DimmyScreen does both, and drives the backlight for real.
So you reach behind the monitor. Every night.
Placeholder — five unlabelled buttons and an OSD from 2009.
Real control
It moves the backlight, not a grey overlay.
Placeholder — the DDC/CI claim, in one sentence, plus the overlay-vs-backlight figure.
Any DDC/CI monitor
Placeholder — the channel the monitor's own OSD uses.
Every monitor, independently
Placeholder — per-display levels, or synced.
Nothing overlaid
Placeholder — games, video and colour work untouched.
Off by default
Placeholder — no location lookup until you ask for one.
The schedule
Driven by the sun's angle, not the clock.
Placeholder — sunset is an instant; switching at an instant steps the backlight exactly when outdoor light moves fastest.
Short winter days
Placeholder.
Long summer evenings
Placeholder.
Inside the polar circles
Placeholder.
The panel
The slider is the level, not just an input.
Placeholder — it follows the hardware, a tick shows where the schedule wants to be, overriding pauses the schedule instead of snapping back.
It shows the current level, always.
Placeholder.
A tick marks the schedule's target.
Placeholder.
Overriding pauses, it doesn't fight you.
Placeholder.
Compatibility
Will it work with my monitor?
Placeholder — most monitors from the last decade speak DDC/CI over the cable already, plus the honest list of what doesn't.
Desktop monitors
Placeholder.
Laptop panels
Placeholder — implemented, unverified.
Monitors that ignore writes
Placeholder — honest caveat.
Download
Placeholder headline for the download band.
Placeholder — licence line, requirements, checksum, and the SmartScreen note if the installer isn't signed.
FAQ
Questions, before you install.
Will it work with my monitor?
Placeholder answer.
Does it work on laptop screens?
Placeholder answer.
How is this different from Night Light or f.lux?
Placeholder answer.
Does it need an internet connection?
Placeholder answer.
Can I still adjust brightness myself?
Placeholder answer.
macOS and Linux?
Placeholder answer.