Privacy Policy

What the app does with sound

Groovelock uses your device's microphone, only while you have pressed LOCK or LIVE, to analyse the music playing around you and estimate its musical key and tempo. The audio is processed in memory on your device in real time. It is never recorded, saved, or sent anywhere.

Analyze a File

When you choose a file or a video, the app reads its audio on your device. A temporary copy is kept only while the analysis runs and is deleted when it finishes. Nothing about the file, its name, or its contents is uploaded.

Data we collect

In the App Store version: none. The app has no accounts, no analytics, no advertising and no third-party services. It does not use any device identifier and makes no network connections.

TestFlight beta builds

Builds installed through Apple's TestFlight show a short “How did it do?” card after a reading. Answering is optional; Skip sends nothing. If you tap Send, the app transmits only the following to our server at groovelock.app:

• your answers (whether the key and tempo were right, and where you were listening), plus any note you type;
• what the app showed: the detected key and tempo, its confidence, how long it listened, and the listening mode;
• the app build number, iOS version and iPhone model;
• a random tester code generated once per install, so answers from the same phone can be grouped. It is not linked to your name, Apple ID or email;
• the time of the answer and, from the connection itself, the country it came from. No precise location is read or sent.

No audio, recordings or file names are ever sent. The data is stored on infrastructure operated by Vercel and Upstash on our behalf, is used only to improve detection, is never sold or shared with anyone else, and is deleted at the end of the beta program or within 30 days of a request to support@groovelock.app (quote the tester code shown on the card). The App Store version contains none of this.

Data stored on your device

Your settings (appearance, haptics, tempo display and range, wheel labels) are kept in the app's local storage so they are remembered next time. Beta builds also keep a local log of your readings and answers, visible under the BETA tag in the app. None of this leaves the device except as described above, and it is removed when you delete the app.

Network access

The App Store version works entirely offline and makes no network connections. Beta builds connect to groovelock.app only when you tap Send on the feedback card. The web version of the app loads two typefaces from Google Fonts, which involves a standard web request to Google's servers; see Google's privacy policy for how they handle such requests.

Children

The app is not directed at children and collects no information from anyone in its App Store version.

Changes and contact

If the app ever adds a feature that collects or transmits data, this policy will be updated first and the app will ask for your consent in that feature. Questions: support@groovelock.app.