Privacy Policy

Last updated: 12 April 2026

Who We Are

Harmonic Frequencies (“we”, “us”, “our”) operates the Harmonic 639 mobile application and the harmonicfrequencies.ai website. This policy explains how we collect, use, and protect your personal information.

What We Collect

  • Account information — your name and email address when you create an account (via Clerk authentication).
  • Usage data — what you listen to, playlists you create, mood selections, journey progress, and session history. This helps us personalise your experience.
  • Health data — if you choose to connect Apple Health, we read and write session data to help you track how you respond to each session. This data stays on your device and in your Apple Health account.
  • Newsletter signup — your email address if you subscribe to our newsletter (via Klaviyo).
  • Contact form — your name, email, and message if you contact us through the website.
  • Voice recordings — if you use the Inspiration Capture feature, we access your device’s microphone to record voice notes. These recordings are processed to extract text and are stored in your account. You can delete any inspiration at any time. We do not use your voice recordings for any purpose other than providing this feature to you.

How We Use Your Data

  • To provide and personalise the Harmonic 639 app experience
  • To save your playlists, play history, and preferences
  • To send you emails if you’ve opted in to our newsletter
  • To respond to your messages via the contact form
  • To improve the app based on aggregate, anonymised usage patterns

What We Don’t Do

  • We do not sell your personal data to anyone
  • We do not use your data for advertising or tracking across other apps
  • We do not share your health data with any third party

Device Permissions

Harmonic 639 may request the following device permissions:

  • Microphone (Audio Recording) — used solely for the Inspiration Capture feature, which lets you record voice notes about ideas or reflections during sessions. Microphone access is only activated when you explicitly tap the record button. We do not record audio in the background or at any other time.
  • Internet access — required to stream music, sync your data, and deliver content.
  • Storage — used to cache music for offline playback and store temporary files.

You can revoke any permission at any time in your device settings. Some features may not work without their required permissions.

Third-Party Services

We use the following services to operate the app and website:

  • Clerk — authentication (stores your email and name securely)
  • Supabase — database for playlists, play history, and app data
  • Klaviyo — email newsletter delivery
  • Vercel — website and app hosting
  • Google Cloud — media asset storage and delivery
  • Expo / EAS — app build and over-the-air update delivery
  • Google Analytics — anonymized website traffic analysis

Each service has its own privacy policy. We only share the minimum data necessary for each service to function.

Data Storage & Security

Your data is stored securely using industry-standard encryption. Account data is managed by Clerk and Supabase, both of which use encrypted connections and secure infrastructure. Health data accessed via Apple Health remains on your device and in your Apple Health account.

Your Rights

You can at any time:

  • Request a copy of your personal data
  • Request deletion of your account and associated data
  • Unsubscribe from our newsletter (link in every email)
  • Revoke Apple Health access in your device settings

To exercise any of these rights, email us at hello@harmonicfrequencies.ai.

Children’s Privacy

Harmonic 639 is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal data, please contact us and we will delete it.

Changes to This Policy

We may update this policy from time to time. We’ll notify you of significant changes via email or an in-app notice. The “last updated” date at the top reflects the most recent revision.

Contact

Questions about this policy? Email hello@harmonicfrequencies.ai.