Privacy Policy

Last updated: 11 November 2026

The short version: SideDim collects nothing about you. No account, no tracking, no analytics, no ads. Everything it needs stays on your PC. The only thing it downloads is its own updates.

Who we are

SideDim is made by the independent developer of SideDim ("we"). Questions about privacy: SideDim's GitHub page.

The SideDim app

No personal data is collected or sent to us. SideDim has no account, no telemetry, no crash reporting to us and no advertising.
Your settings and a small log file are stored only on your PC (in your Windows user folder). You can delete them at any time by uninstalling SideDim.
Notifications: if you allow it, Windows tells SideDim when a notification arrives and from which app. SideDim uses only the app's name to decide which effect to show. It never reads, stores or sends the content of your messages. The last few app names are shown in Settings → Notifications and are not saved.
Which app is fullscreen: SideDim looks at the program name of the window you are using, only to decide whether to dim. This stays on your PC.
Monitor brightness (optional): if you turn on real backlight dimming, SideDim talks to your monitors over their cable (DDC/CI). Nothing leaves your PC.
Automatic updates (copies downloaded from our website or as a ZIP): a few times a day SideDim downloads a small update list and, when there is a new version, the update itself, from GitHub (github.com). Like any website, GitHub can see your IP address when files are downloaded; see GitHub's privacy statement. SideDim sends nothing about you with these requests. You can switch this off in Settings → General → Updates. Copies from the Microsoft Store are updated by the Store instead.
License keys are checked on your PC, offline. Nothing is sent to us to check them. The key contains the name and order number it was made for.
Pro trial: the start date is saved in your settings on your PC.

Buying SideDim Pro

Pro isn't on sale yet. When it is, payments will be handled by Microsoft (Store version) or by a payment company named here (website). They process your name, email, payment details and country to take the payment, send your receipt and license key, handle taxes and refunds — under their own privacy policy. We receive your name, email, country and what you bought, which we use only to deliver and support your purchase (for example to resend a lost key) and to meet tax and accounting rules. We keep it as long as the law requires, then delete it.

This website

No cookies, no tracking, no analytics, no fonts or scripts from other companies. Our host (Cloudflare) may keep standard server logs (such as IP address and time) for security, for a short time.

Your rights

Depending on where you live (for example under the GDPR in the EU/UK), you can ask what data we have about you, ask us to correct or delete it, or object to how it is used, and you can complain to your data protection authority. Since the app collects nothing, this mostly concerns purchase records. Email SideDim's GitHub page.

Children

SideDim is not aimed at children under 13 and we do not knowingly collect any data from them (or anyone else).

Changes

If this policy changes, we update this page and the date above. If SideDim ever started to collect anything, we would ask you first.