Privacy Policy

Last updated: 2026-05-20

Klck is a metronome. It does not collect, transmit, or share any personal information about you. This page exists because the App Store requires every app to publish a privacy policy — Klck’s is short because there is essentially nothing to disclose.

What information Klck collects

None. Klck has no user accounts, no analytics, no crash reporting, no advertising SDKs, no third-party network services, and does not contact any remote server during normal operation.

How Klck uses the microphone

Klck includes a chromatic instrument tuner. When you tap LISTEN on the tuner panel, Klck requests permission to use the device microphone solely to estimate the fundamental pitch of the sound it picks up. The audio:

• Is processed entirely on-device using autocorrelation.
• Is never recorded to a file.
• Is never transmitted to a server or any third party.
• Is discarded as soon as it has been analyzed for pitch.

You can revoke microphone access at any time in Settings ▸ Privacy & Security ▸ Microphone ▸ Klck.

How Klck stores your settings

Presets, setlists, and your in-app preferences are saved as small JSON files inside Klck’s own app sandbox on your device (in iOS’s Application Support directory, or the equivalent on macOS). These files never leave your device. Deleting Klck removes them automatically.

Network usage

Klck makes no network requests. It will continue to function with no network connection.

Third-party services

Klck does not embed any third-party SDKs, analytics frameworks, ad networks, or telemetry libraries.

Children’s privacy

Klck does not collect data from anyone of any age. Apple has rated it for ages 4+.

Changes to this policy

If Klck’s privacy practices ever change, this page will be updated and the Last updated date above will reflect the change. Historical versions are available through the GitHub history of this file.

Contact

Questions or concerns? Open a GitHub issue on the Klck repository.