KeyCusSou for macOS Privacy Policy

Effective date: October 23, 2026

This Privacy Policy explains how KeyCusSou for macOS (“KeyCusSou,” “the app,” “we,” or “us”) handles information when you use the app. KeyCusSou is a keyboard-sound and visual-effects utility. The app is designed to operate locally on your Mac.

Information the app processes

Keyboard events and Input Monitoring

If you choose to enable keyboard sounds or keyboard-triggered visual effects, macOS may require you to grant KeyCusSou Input Monitoring permission. The app uses a passive, listen-only keyboard event monitor to determine the physical key event needed to trigger a sound or visual effect and to apply your enabled settings. It does not change, block, or synthesize keyboard events.

KeyCusSou does not extract or store the characters you type, create a typing history, or record keypress timestamps or sequences. Keyboard events are processed transiently on your Mac for the requested effect. When monitoring is disabled, unavailable, or suspended by macOS Secure Input, the app stops or suppresses the corresponding monitoring/effects. Secure Input handling is not a guarantee that every password field or sensitive-entry context can be detected.

You can revoke Input Monitoring permission at any time in macOS System Settings under Privacy & Security. Keyboard monitoring is optional; built-in sound previews can be used without it.

Settings and preferences

Your app preferences—such as sound enablement, volume, selected sound pack, shortcut filtering, and visual-effect settings—are stored locally using macOS preferences storage (UserDefaults). These preferences are used to configure the app and persist across launches. They are not sent to us by KeyCusSou.

Sound and visual effects

Sound samples are bundled with the app and played locally. Keyboard-triggered visual effects are rendered locally. The app does not use the microphone, camera, contacts, location, or photo library for these features.

Purchases

KeyCusSou uses Apple’s StoreKit to display and process optional in-app purchases and to check or restore eligible purchase entitlements. Apple handles payment information and purchase transactions under Apple’s own terms and privacy practices. KeyCusSou does not receive or store your payment-card details. The app may receive purchase-verification and entitlement information from StoreKit so it can unlock purchased features. We do not use that information to build an advertising profile.

Information we collect and share

KeyCusSou does not include our own analytics, advertising, tracking, or telemetry service, and it does not transmit keyboard content or app preferences to us. The app does not make network requests for its keyboard, audio, or visual-effect functionality. Apple may process information independently when you use App Store, StoreKit, macOS, or related Apple services; that processing is governed by Apple’s policies and settings.

We do not sell, rent, or share personal information collected by the app with third parties for their marketing purposes.

Data retention and deletion

KeyCusSou does not maintain an account or a server-side profile for you. Local preferences remain on your Mac until removed by you or by uninstalling/resetting the app and its associated data. Purchase records and eligible entitlements are managed through your Apple Account and Apple’s services; use Apple’s purchase and account controls for those records.

Children’s privacy

KeyCusSou is a general-purpose utility and is not designed to collect personal information from children. Because the app does not operate an account or collect information through our own servers, we do not knowingly collect children’s personal information.

Security

Keyboard event processing and app preferences are handled locally by the app and macOS. No method of software storage or processing can be guaranteed to be completely secure, but KeyCusSou is designed not to retain typed content or transmit it to us.

Changes to this policy

We may update this Privacy Policy if the app’s features or applicable requirements change. The revised policy will be published at the same location with an updated effective date. Please review it periodically.

Contact

For privacy questions or requests, contact the app’s developer through the support contact listed on the KeyCusSou App Store product page.

App Store submission note

Before publishing, host this policy at a publicly accessible, stable URL and enter that URL in App Store Connect. Ensure the developer/support contact on the App Store product page is current. App Store privacy disclosures should be reviewed against the exact release build and Apple’s current requirements.