Transparency
Why you can trust Screen Mercy.
One developer. One product. The app itself has no analytics, no telemetry, no tracking. Everything below is something you can verify yourself in about five minutes. (This marketing website uses standard, privacy-respecting web analytics — see the note below.)
Built by one person.
Screen Mercy started because Night Shift built into macOS didn't reduce enough blue light even at the maximum setting. I've been using it myself for months before I even thought of publishing it. Now, I bring Screen Mercy to you.
When you email support, you talk directly to me. When you report a bug, I am the one who fixes it. When you suggest a feature, I read every word, because there is nobody else to forward it to.
Privacy by design.
Works offline.
Block every outbound connection with Little Snitch or your firewall of choice and Screen Mercy keeps working. Day to day, the features that make the app worth installing need zero network access. The only time Pro reaches out is the one-time activation when you first paste your key.
Location only if you want.
Location is requested for one reason: so the solar curve matches your actual position on Earth. Prefer not to share it? Type your coordinates by hand and never grant the permission at all.
The app: no tracking. No telemetry.
The only times the app reaches the network are a one-time Pro activation and an optional update check you can turn off in settings. No analytics SDK, no fingerprinting, no "anonymous" usage data quietly piling up somewhere.
Your license is yours.
Unlocking Pro takes one consented network request to register your Mac. After that, your license is verified entirely on your Mac: no recurring checks, no DRM call-home, no future where someone flips a switch and shuts off the lights.
How it actually works.
The sun math runs on your Mac.
Screen Mercy uses the same solar position math the U.S. National Weather Service publishes for tracking the sun. It runs entirely on your machine. Your location is used as math input, then discarded. It is never transmitted, never stored, never logged.
Color happens on your Mac.
The app applies the color curve through standard macOS display APIs. No cloud processing. No remote servers. The pixel changes happen between your GPU and your monitor cable, and they stop there.
Update checks are optional.
If you leave auto-updates on, the app fetches a signed manifest from our server. That request carries only what a browser carries: your IP, the app version, a user agent. You can turn it off entirely and check for updates by hand whenever you like.
Pro activation is one and done.
When you buy Pro and paste your key, the app makes a single, consented request to register that Mac and unlock the Pro features. It sends your license key and a one-way hash of your Mac's hardware id, never the raw id, so we can hold the line on a per-license device limit. Nothing is sent after that: no re-checks, no expiry, no kill switch.
Don't trust us. Verify us.
Install Little Snitch or open Wireshark. Run Screen Mercy for a week. With optional features turned off, you will see zero outbound connections from the app. Not one. (Activating Pro is a single request the first time you paste your key; after that, nothing.)
With update checks left on, you will see the occasional HTTPS request to our manifest server. Nothing else from the app — no analytics domains, no tracking pixels, no mysterious uploads in the middle of the night.
About this website.
The promises above are about the Screen Mercy app, which is what runs on your Mac. This marketing website is separate, and it does use standard, privacy-respecting web analytics — Vercel Web Analytics (cookieless) and PostHog — so we can see which pages help people and how many downloads start. We honor your browser's Do‑Not‑Track setting, we don't sell your data, and we don't track you across other sites. Details are in our privacy policy.
Questions about any of this?
If you have any concern about privacy or security, ask away. support@screenmercy.com goes to a real person who will answer you, not a form letter.