Privacy Policy

StereoPrana (Sound Healing) — last updated October 1, 2026

This policy explains what data StereoPrana ("the app") collects and how it is used. We collect the minimum needed to run the app and process payments — we do not sell your data.

Information we collect

• Account information. If you sign in, we store your email address and a unique account ID (via Firebase Authentication) to identify your account and subscription status.
• Subscription / purchase data. When you purchase a premium plan, you pay on a payment processor's own page — ProOnline for Russian bank cards and SBP, or Lava for cards from other countries. It collects the details it needs to take the payment — this may include your name, phone number, email address and payment card details — under its own privacy policy. We pass the email address you entered at checkout to it so it can prefill that page. It sends us a payment confirmation (order, amount, plan, status and your email), which we use to grant access. We keep your email, plan and payment status; we do not keep your name or phone number from that page, and we never receive or store your card details. Subscriptions bought through Lava renew automatically each month or year until cancelled; those bought through ProOnline are valid for the period paid and do not renew. Purchases made before October 2026 were processed by Tribute.
• Push notifications. If notifications are enabled, your device subscribes to a broadcast topic via Firebase Cloud Messaging so we can send announcements. We do not store your device's push token ourselves — Google/Firebase manages topic delivery.
• App content and usage. The track library, categories and your listening/download cache are stored on your device and in our Firebase database to keep the catalog in sync.

Information we do not collect

The app does not access your microphone, camera, contacts, or location. Any microphone permission declared by the app's underlying audio framework is unused by StereoPrana and is never activated.

Third-party services

• Google Firebase (Authentication, Cloud Firestore, Cloud Functions, Cloud Messaging) — used to run the app's backend. See Firebase's privacy policy.
• ProOnline — used to process subscription payments, and receives the email address you enter at checkout. See ProOnline's own privacy policy for how they handle payment data.
• Lava (lava.top) — used to process subscription payments by card from outside Russia, and receives the email address you enter at checkout. See Lava's own privacy policy for how they handle payment data.
• Tribute — processed subscription payments made before October 2026. See Tribute's own privacy policy for how they handle payment data.

Data retention and deletion

We retain account and subscription data for as long as your account is active. You can permanently delete your account and profile data at any time from within the app (Profile → account menu → Delete account), or by emailing us at the address below.

Children's privacy

StereoPrana is not directed at children under 13, and we do not knowingly collect data from children under 13.

Changes to this policy

We may update this policy from time to time. Changes will be posted on this page with an updated date above.

Contact

Questions about this policy or your data? Email hello@humanalchemy.pro.

StereoPrana — curated focused-frequency sound therapy.