Privacy Policy

Last updated: 3 November 2026 (draft)

This Privacy Policy describes the information ProMax Display handles when you buy, activate, use or update the app, how it is used, who it is shared with, and your rights. It applies to the ProMax Display app and to the website at promaxdisplay.com.

For the purposes of data-protection law, the controller of personal information processed in connection with ProMax Display is ProMax Display. Questions about this policy, including requests to exercise the rights below, can be sent to [email protected].

1. Overview

ProMax Display is a Mac app that runs on your Mac. The app does not include analytics, usage tracking, crash reporting, advertising or any third-party telemetry. It only contacts the internet to activate and check your licence and to check for updates, both described below. The website may use one product-analytics service (PostHog), described in section 2.7.

2. Information we handle

2.1 Licence activation

When you activate ProMax Display, the app sends your licence key and the name of your Mac (as set in macOS, which often includes your first name, for example Anna’s MacBook Pro) to our payment processor, Lemon Squeezy. Lemon Squeezy uses these to keep track of which Macs your licence is active on. When the app opens, and once a day while it runs, it asks Lemon Squeezy whether the licence is still valid, sending the key and the activation ID Lemon Squeezy gave this Mac. When you deactivate a Mac, the app tells Lemon Squeezy so the activation is freed. Lemon Squeezy’s reply includes your name, email address and purchase date, which the app shows on its Licence page; they are stored on your Mac only.

Activation data is held by Lemon Squeezy under their privacy practices. We do not receive a copy of your activation history or billing details beyond what Lemon Squeezy shows us in its merchant dashboard.

2.2 Update checks

ProMax Display uses the open-source Sparkle framework to check for updates. The app fetches a small file from promaxdisplay.com/appcast.xml and, if there’s a new version, downloads it from the same site. Our hosting provider may log standard request data (your IP address and browser or app identifier) as part of routine traffic logging. We don’t use these logs for analytics, profiling or marketing. Sparkle sends no information about your Mac with these checks beyond that standard request data. You can switch automatic checks off on the app’s About page.

2.3 Screen Recording: the mirror and window previews

The rear-view mirror needs macOS’s Screen Recording permission so it can show the part of the screen behind the notch. It reads that small area only while the mirror is showing and draws it live on your screen. If you turn on Choose windows too for the Dock switcher, the same permission lets it show small previews of an app’s windows while you choose one. Nothing is recorded, saved or sent anywhere.

2.4 Accessibility: gestures, the mirror, pinch to fill and the pointer

The trackpad gestures need macOS’s Accessibility permission. ProMax Display uses it to open the Dock, the menu bar and Control Center when you swipe, and to stop the page under the pointer from scrolling while you swipe. It also reads the names of the apps in the Dock, the items in an app’s menus and the titles of an app’s windows, so you can choose one. While the pointer is behind the notch, it asks the full screen app whether a button or field of its own is there, so that control keeps working. For pinch to fill, it checks whether the front window is full screen and presses the video player’s own zoom button. It also watches the pointer at the top of the screen and near rounded corners, so the top edge inside the notch doesn’t bring down the menu bar and the pointer keeps to the corners’ curve. All of this happens on your Mac, only while you use one of these features, and none of it is sent anywhere. The only part kept is short troubleshooting notes in your Mac’s own system log, such as the name of an app you switched to or a menu item you chose. They stay on your Mac, and macOS clears its log by itself over time.

2.5 Settings and files on your Mac

Your settings (the main switch, excluded apps, mirror, gesture and corner options) and your licence details are stored on your Mac using standard macOS APIs. When you switch on an app’s own notch-row setting, ProMax Display changes that one setting in the app’s settings file and remembers what was there, so it can put it back. To unlock every app, it installs a helper (allowed by you in Login Items), a small add-on for the Dock, and a safety net (a background task in your Library folder that puts full screen back to normal if the app can’t, and removes itself if the app is deleted), and turns on macOS’s full screen compatibility setting for every app (in each sandboxed app’s own settings too), with it turned off for the apps you exclude. So that the menu bar doesn’t sit over the notch row, it sets macOS’s menu bar to hide in full screen if it was set to always show there, and remembers your choice. Once you activate it, it turns on the Dock’s automatic hiding and remembers what you had. For the browser extensions, it puts a small file in each installed browser’s support folder that tells the browser how to reach the app. Uninstalling puts these back as they were before ProMax Display changed them; in an app’s own settings file, a value you’ve since changed yourself stays as you set it. None of this data leaves your Mac.

2.6 The browser extension

The ProMax Display extension for Chrome, other Chromium browsers (such as Arc, Dia, Brave and Edge), Firefox and Safari lets you pinch a full-screen video to fill the screen. It runs on the pages you visit so it can find the video that’s full screen, and only acts on that video while it’s full screen. To find black bars built into a film, it looks at a tiny copy of the video’s current picture, 96 pixels wide, inside the page; the copy isn’t kept or sent. It reads nothing else on the page: not your browsing history, page content, form entries or passwords. It talks only to the ProMax Display app on your Mac, through a small program inside the app that the browser starts for it. That program tells the extension whether pinch-to-fill is switched on and which way your trackpad scrolls, and nothing else. The extension uses it to ask whether pinch-to-fill is switched on (and, for diagnosing problems, to add short notes about the zoom, such as the video’s size and the name of the site it’s on, to the app’s log, which stays on your Mac). It stores one setting (whether you last chose to fill or to fit) in the browser’s own extension storage. The extension collects no personal data and sends nothing to us or to anyone else.

2.7 Website

The promaxdisplay.com website may use PostHog for product analytics. If it does, PostHog records page views and a small number of explicit interactions (for example, clicks on the Buy button), so we can understand how visitors find and use the site. It processes the page you visit, your approximate location derived from your IP address, your browser and operating system, your screen size, and a session identifier that links events on the page you’re on. Your licence key, which appears in the thank-you page’s address after a purchase, is removed before anything is sent, so it never reaches PostHog. Like any request, the page’s address, key included, can appear in Cloudflare’s standard request logs (section 4).

Our PostHog project is hosted in the European Union at eu.i.posthog.com and set to keep the session identifier in your browser’s memory only, so it is gone when you leave or reload the page and no analytics cookies are set. PostHog is not used for advertising or to build a marketing profile.

The website uses no other analytics, advertising network or tracker, and doesn’t need an account.

2.8 Cookies

The website doesn’t set cookies of its own, and PostHog is set up not to use them (above). Our hosting provider, Cloudflare, may set a strictly necessary cookie to tell people from bots; we don’t use it to track you. When you click Buy, the checkout opens on Lemon Squeezy’s site, which uses its own cookies to take your payment, under Lemon Squeezy’s Privacy Policy. Nothing is stored on your device beyond what’s strictly necessary, so there’s no cookie banner. The app doesn’t use cookies.

3. What we don’t do

The ProMax Display app does not collect:

  • Telemetry or in-app usage data.
  • Crash reports.
  • Information about which features or settings you use, or which apps you run.
  • Anything from your screen. The mirror shows it live and keeps nothing.
  • Personal information beyond what is described in section 2.1.

We do not sell, rent or share your data for marketing, and we do not use it to train AI models or for anything unrelated to providing ProMax Display.

4. Third-party services

  • Lemon Squeezy processes payments and manages licences. Your name, email, billing details and licence activations are held by Lemon Squeezy. See Lemon Squeezy’s Privacy Policy.
  • Cloudflare hosts promaxdisplay.com and serves the update feed and downloads. Cloudflare may log standard request data. See Cloudflare’s Privacy Policy.
  • PostHog, if switched on, provides website analytics as described in section 2.7. See PostHog’s Privacy Policy.

We use no other third parties: no email-marketing tool, advertising network, cloud sync, session recording or heatmaps.

5. Where your data is stored

  • Your Mac: settings, licence details, the helper and the Dock add-on (section 2.5).
  • Lemon Squeezy: your purchase record and licence activations. Lemon Squeezy is based in the United States.
  • Cloudflare: routine request logs, processed across Cloudflare’s global network.
  • PostHog: website page views and interactions, if switched on, stored in the European Union.

If you are in the European Economic Area or the United Kingdom, transfers of data to Lemon Squeezy and Cloudflare rely on the standard contractual clauses or other lawful transfer mechanisms those providers operate.

6. Legal basis for processing (EEA and UK)

  • Performance of a contract. To provide ProMax Display and process your purchase, including licence activation and checks.
  • Legitimate interests. To keep the service working, secure and free of fraud, and to understand how the website is used.
  • Legal obligations. To keep tax records and respond to lawful requests.
  • Consent. For anything you have specifically agreed to.

We do not use your information for automated decision-making or profiling with legal or similarly significant effects.

7. Your rights

Depending on where you live, you may have the right to:

  • Know what information we hold about you and get a copy.
  • Have it corrected or deleted.
  • Object to or restrict processing.
  • Data portability.
  • Withdraw consent for processing that relies on it.
  • Complain to your local data-protection authority (in the UK, the ICO).

To exercise any of these, email [email protected]. We will reply within 30 days. For purchase records held by Lemon Squeezy, you may also need to contact them.

8. Disclosures required by law

We may disclose information where we believe in good faith that it’s necessary to comply with the law or a valid legal request, enforce our Terms of Use, prevent fraud or security problems, or protect the rights, property or safety of ProMax Display, our users or the public.

9. Data retention

Licence records stay with Lemon Squeezy for as long as your licence is valid, plus any period tax or accounting law requires. Hosting logs are kept according to Cloudflare’s standard practice. To remove everything ProMax Display keeps on your Mac, click Uninstall on its About page: it deletes its settings and your licence details, removes the helper and the add-on, and puts back every setting it changed. Dragging the app to the Bin on its own leaves those behind; open it once more and click Uninstall, or email us and we’ll help.

10. Children

ProMax Display is not directed at children under 16, and we do not knowingly collect their personal information. If you believe a child has bought ProMax Display, contact [email protected] and we will help with a refund and deletion.

11. Security

The app talks to Lemon Squeezy and our update server over HTTPS, and updates are signed so the app only installs genuine ones. No system is perfectly secure, so we can’t promise ours is.

12. Changes to this policy

We may update this policy to reflect changes to the product or the law. The "Last updated" date at the top shows the latest version. If a change is material, we’ll say so on this page.

13. Contact

For questions about this policy, or to exercise any of the rights above, email [email protected].