Privacy Policy

Last updated: February 20, 2026

The short version

SoundPrism processes all audio locally on your Mac. We don't collect, transmit, or store any of your data. Period.

📊 How we compare

Most macOS audio tools collect data about how you use them. Here's a factual comparison:

SoundPrism SoundSource eqMac
App Analytics None Usage stats via updates Feature usage, launches, device type
Website Tracking None Third-party services Google Analytics
System Driver Not required ACE audio driver Virtual audio device
Crash Reports Local only, never uploaded Opt-in via support Automatic anonymous reports

Data verified February 2026 from each product's published privacy policy.

Audio Data

SoundPrism uses native macOS frameworks to process per-app audio output. All audio processing (volume, EQ, compression, noise gate, balance) happens entirely on your device. No audio data is ever transmitted over the network.

Crash Reports

If SoundPrism crashes, a crash report is saved locally on your Mac. These reports contain only technical information (stack traces, app version, macOS version) and are never automatically uploaded. You can view or delete them at any time.

Software Updates

SoundPrism uses Sparkle to check for updates. When checking for updates, Sparkle sends a request to our update server (castorlogic.com) which includes your macOS version and app version. No personal information is included. You can disable automatic update checks in preferences.

Licensing

License verification is handled by Paddle. When you purchase or activate a license, Paddle processes your payment information according to their privacy policy. SoundPrism itself does not store your payment details.

Settings & Preferences

Your per-app settings (volume, EQ, routing, compressor) are stored locally on your Mac. They never leave your machine.

Analytics & Telemetry

SoundPrism contains no analytics, no telemetry, and no tracking. We don't use Google Analytics, Mixpanel, or any third-party analytics service on our app or website.

macOS Permissions

SoundPrism requests the following macOS permissions:

  • Screen Recording / Audio Capture: Required by macOS for processing per-app audio. No screen content is captured.
  • Accessibility (optional): Used only for global keyboard shortcuts (e.g., ⌘⇧M for mute-all).
  • Network (outbound): Used only for Sparkle update checks and Paddle license verification.

Contact

Questions about this policy? Email [email protected].