Privacy Policy

Sinuose (“we”, “our”, “us”) operates the Sinuose web application and mobile application (the “Service”). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service. Please read this policy carefully. By using Sinuose, you agree to the collection and use of information in accordance with this policy.

Account Information: When you create an account, we collect your email address, display name, and profile avatar selection. If you sign in via Google or Apple, we receive your name and email from those providers. We do not receive or store your Google or Apple password. Audio Files: When you upload an MP3 file for enhancement, the file is temporarily processed on our servers. We do not permanently store your original audio files after processing is complete. Enhanced audio files that you save to your library are stored in our cloud database (Convex) and associated with your account. Usage Data: We collect information about how you use the Service, including enhancement mode selections, daily usage counts, enhancement scores, and queue activity. This data is used to enforce usage limits and improve our service. Payment Information:Subscription payments are processed through Apple's In-App Purchase system (for iOS) or through our payment processor Adapty. We do not directly collect, store, or have access to your credit card number or payment details. Payment processing is handled entirely by Apple and Adapty in accordance with their respective privacy policies.

When you enhance an audio file, it is sent from your device to our API server (hosted on Vercel), which forwards it to our audio processing server (hosted on Railway). The audio is processed using FFmpeg, an open-source audio processing tool — we do not use artificial intelligence or machine learning to process your audio. The processing applies equalization, compression, loudness normalization, and stereo enhancement using deterministic digital signal processing algorithms. Your audio file is temporarily stored during processing (typically 5-15 seconds) and is deleted from the processing server immediately after the enhanced version is returned to you. If you choose to save the enhanced track to your library, it is stored in our database (Convex, hosted in the United States) until you delete it.

Sinuose uses the following third-party services that may process your data: • Clerk(clerk.com) — Authentication and user management. Processes your email, name, and login credentials. Privacy policy: https://clerk.com/legal/privacy • Convex(convex.dev) — Cloud database. Stores your profile, tracks, and usage data. Servers located in the United States. Privacy policy: https://www.convex.dev/legal/privacy • Vercel(vercel.com) — Hosts our web application. May log IP addresses and request metadata. Privacy policy: https://vercel.com/legal/privacy-policy • Railway(railway.app) — Hosts our audio processing server. Audio files pass through Railway's infrastructure during enhancement. Privacy policy: https://railway.app/legal/privacy • Adapty(adapty.io) — Manages in-app subscriptions and payment processing. Privacy policy: https://adapty.io/privacy • Apple— Handles In-App Purchase transactions and Sign in with Apple authentication. Privacy policy: https://www.apple.com/legal/privacy • Google— Provides Sign in with Google authentication. Privacy policy: https://policies.google.com/privacy

Your data is stored on servers located in the United States. If you are accessing the Service from outside the United States, please be aware that your data may be transferred to, stored, and processed in the United States. By using Sinuose, you consent to the transfer of your information to the United States.

We retain your account information and library data for as long as your account is active. Audio files uploaded for enhancement are deleted from our processing servers immediately after processing. If you delete your account through the Settings page, all associated data (profile, tracks, usage history, and follows) is permanently deleted within 30 days.

You have the right to: • Access the personal data we hold about you • Request correction of inaccurate data • Delete your account and all associated data (available in Settings → Danger Zone) • Export your enhanced tracks by downloading them from your library • Withdraw consent for data processing by deleting your account For EU/EEA residents: You have additional rights under the General Data Protection Regulation (GDPR), including the right to data portability and the right to lodge a complaint with a supervisory authority.

Sinuose is not intended for use by children under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have collected data from a child under 13, we will take steps to delete that information promptly.

We use commercially reasonable measures to protect your personal information, including encrypted connections (HTTPS/TLS) for all data transmission, secure authentication through Clerk, and access controls on our databases. However, no method of electronic storage or transmission is 100% secure, and we cannot guarantee absolute security.

We may update this Privacy Policy from time to time. We will notify you of any changes by updating the “Last updated” date at the top of this page. Continued use of the Service after changes constitutes acceptance of the updated policy.

If you have questions about this Privacy Policy or your data, contact us at: Email: privacy@sinuose.app Sinuose Copenhagen, Denmark