Privacy Policy

Last updated: 29 October 2026

Underpressured is a Mac app that compresses, resizes, and converts images. This policy covers both versions of the app: the Mac App Store version and the version you download from GitHub or install with Homebrew. It also covers messages you send to support.

The short version

Underpressured does not collect personal data. Your images never leave your Mac. The app has no analytics, no advertising, no tracking, and no account.

Your images and files

All image processing happens on your Mac. The app never uploads images, file names, folder names, or image metadata.

The app opens only the files and folders you give it: by dropping them on the window or the Dock icon, choosing them in the Open panel, or using Open With in Finder. It writes results only next to those files or into an export folder you choose.

If a preset has Keep metadata turned on, output files keep metadata such as EXIF, GPS location, IPTC, and XMP. Turn it off to remove that metadata, including location, from the files the app writes. This matters when you share images publicly.

Data stored on your Mac

The app stores your presets, your destination choice, the export folder you selected, and your update preference in its local preferences. This data stays on your Mac. Deleting the app and its preferences removes it.

Notifications

If you allow notifications, the app shows a local notification when a batch finishes in the background. The notification is created on your Mac and does not pass through any server.

Network connections

Mac App Store version: the app makes no network connections. Updates come through the Mac App Store.

GitHub and Homebrew version: the app connects to the internet only to check for updates, and only if you turn on automatic checks or choose Check for Updates… yourself. An update check downloads a file from GitHub Pages (a-dev.github.io). If you install an update, the app downloads it from GitHub Releases. These requests include the app name and version and the macOS version in the standard request header. The app sends no other information about you, your Mac, or your files. GitHub receives your IP address as part of any web request. See the GitHub Privacy Statement.

Crash reports

The app has no crash reporter of its own. If you turned on Share with app developers in macOS (System Settings > Privacy & Security > Analytics & Improvements), Apple may share crash reports with us. Apple removes identifying information first. You control this setting in macOS.

Email and support

If you email us, use the support form, or open a GitHub issue, we receive what you send, such as your email address, name, and message. We use it only to answer you and to improve the app. We don’t sell it or share it with anyone. The support form sends your message to us through Web3Forms, which delivers it by email. Ask us at any time to delete your messages. GitHub issues are public and governed by GitHub’s terms.

Children

The app collects no data from anyone, including children.

Your rights

Because the app collects no personal data, we hold no data about you, except messages you sent to support. Depending on where you live (for example, under the GDPR in the EU and UK or the CCPA in California), you can ask to see or delete that data. Email support@underpressured.app.

Changes

If this policy changes, we’ll update this page and the date at the top. Changes that affect how the app handles data will also appear in the release notes.

Creator

Underpressured is made by Andrei Dementev.