Privacy Policy

This policy explains what data MixSleuth ("we", "us") processes when you use the MixSleuth Mac app and the mixsleuth.com website, and your rights under applicable data protection law. MixSleuth is the trading name of an independent sole trader, who is the data controller; you can contact us at hello@mixsleuth.com, and we'll provide full registered details on request.

1. The app analyses your mixes on your device

The core of MixSleuth — splitting a recorded DJ mix into a tracklist by matching it against your own music library — runs entirely on your Mac. Your mix files and your library are read locally and are not uploaded to us or to any server. The fingerprints and analysis caches the app creates are stored locally in your app support folder. If you never use online identification, no audio or fingerprint data leaves your computer.

2. Online track identification

When you choose to identify tracks online (for tracks that aren't in your own library), the app sends short audio clips — typically a few seconds each — to a music recognition service. We use:

• Apple ShazamKit — your Mac computes an audio signature on-device and sends that signature (not the audio itself) to Apple to look up a match. This is governed by Apple's Privacy Policy.
• AudD — a short audio clip is sent, via our own relay server, to the AudD recognition API. We operate the relay only to protect access credentials and apply fair-use limits; we do not retain your clips on it beyond what is needed to complete the request. AudD's handling is governed by their terms.

Only the clips needed for identification are sent — never your entire mix file. The result we receive back is track metadata (artist, title and similar), which is shown to you and stored locally with your session.

3. Purchases and payments

We never see or store your card details. Payments are handled by our payment providers, who act as merchant of record:

• On the Mac App Store, Apple processes your purchase and subscription under its own terms.
• For direct downloads, a third-party merchant of record (such as Polar or Paddle) processes the payment, handles tax, and provides your licence. They share with us only what we need to deliver and support your purchase (for example your email and order reference).

4. The website

mixsleuth.com is a static site and its free browser tools (such as the Track Marker and the Rekordbox → Mixcloud converter) run entirely in your browser — the files you load into them are not uploaded. We keep any website analytics minimal and privacy-respecting, and we do not use advertising trackers.

5. Legal bases (GDPR)

• Performance of a contract — to provide the app, process purchases, and deliver support.
• Legitimate interests — to operate the relay service securely, prevent abuse, and improve the product.

6. Your rights

Where data protection law such as the UK or EU GDPR applies to you, you have the right to access, correct, delete, restrict or port your personal data, to object to certain processing, and to withdraw any consent. To exercise any of these, email hello@mixsleuth.com. You can also complain to your data protection regulator — in the UK, the Information Commissioner's Office (ico.org.uk); in Hong Kong, the Office of the Privacy Commissioner for Personal Data (pcpd.org.hk).

7. Data retention

On-device data stays until you delete it or uninstall the app. Purchase and support records are kept as long as needed for the service and to meet legal/accounting obligations.

8. International transfers

Some providers (e.g. Apple, AudD, our payment and hosting providers) may process data internationally. Where they do, appropriate safeguards such as standard contractual clauses apply.

9. Children

MixSleuth is not directed at children under 16, and we do not knowingly collect their data.

10. Changes

We may update this policy as the product evolves. We'll change the "last updated" date above and, for material changes, give notice in the app or on this site.

11. Contact

Questions or requests: hello@mixsleuth.com.