Privacy Policy

Last Updated: March 27, 2026

Appcellent Yazilim Hizmetleri A.S. ("Appcellent," "we," "our," or "us") operates the Volume Booster mobile application (the "App"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our App.

By using the App, you agree to the collection and use of information in accordance with this policy.

Information We Collect

Information You Provide

  • Preferences: Your audio settings, equalizer presets, bass boost levels, and playback preferences.

Information Collected Automatically

  • Device Information: Device model, operating system version, unique device identifiers (IDFV), and general device settings.
  • Usage Data: Interaction data such as features used, screens viewed, and session duration.
  • Music Library Metadata: When you grant access, we read metadata (song titles, artists, durations) from your Apple Music library to display your songs in the app. This data is processed entirely on your device and is not transmitted to our servers.
  • Purchase Data: Subscription status, purchase history, and transaction identifiers related to in-app purchases.
  • Analytics Data: We use third-party analytics services to understand how users interact with the App. This may include aggregated and anonymized usage statistics.

Information from Third-Party Services

  • RevenueCat: We use RevenueCat to manage subscriptions and in-app purchases. RevenueCat may collect purchase receipts, device identifiers, and subscription status. For more information, see RevenueCat's Privacy Policy.
  • Mixpanel: We use Mixpanel for analytics to improve the App experience. Mixpanel may collect usage events, device properties, and anonymized interaction data. For more information, see Mixpanel's Privacy Policy.

How We Use Your Information

We use the information we collect to:

  • Provide, maintain, and improve the App and its features.
  • Save and restore your audio settings and equalizer preferences.
  • Process and manage your subscription and in-app purchases.
  • Analyze usage trends and optimize App performance.
  • Detect, prevent, and address technical issues or fraudulent activity.
  • Comply with legal obligations.

How We Share Your Information

We do not sell your personal information. We may share your information in the following circumstances:

  • Service Providers: We share data with third-party service providers (RevenueCat, Mixpanel) that help us operate and improve the App. These providers are contractually obligated to protect your information.
  • Legal Requirements: We may disclose your information if required by law, regulation, legal process, or governmental request.
  • Business Transfers: In the event of a merger, acquisition, or sale of assets, your information may be transferred as part of that transaction.
  • With Your Consent: We may share your information for other purposes with your explicit consent.

Data Retention

We retain your personal information for as long as needed to provide you with the App's services. Preferences and settings are stored locally on your device. Analytics data is retained in aggregated or anonymized form and may be kept indefinitely for product improvement purposes.

Data Security

We implement appropriate technical and organizational measures to protect your personal information against unauthorized access, alteration, disclosure, or destruction. However, no method of transmission over the internet or electronic storage is completely secure, and we cannot guarantee absolute security.

Legal Basis for Processing (EEA/UK Users)

If you are located in the European Economic Area (EEA) or the United Kingdom, we process your personal data based on the following legal grounds under the General Data Protection Regulation (GDPR):

  • Contractual Necessity: Processing your preferences and settings is necessary to provide the App's services to you.
  • Consent: We process certain data, such as analytics data, based on your explicit consent. You may withdraw your consent at any time.
  • Legitimate Interest: We process usage and analytics data to improve the App, detect fraud, and ensure security, where our interests do not override your fundamental rights.
  • Legal Obligation: We may process data to comply with applicable laws and regulations.

Your Rights and Choices

Depending on your jurisdiction, you may have the following rights:

  • Access: Request access to the personal information we hold about you.
  • Correction: Request correction of inaccurate or incomplete personal information.
  • Deletion: Request deletion of your personal information.
  • Restriction: Request restriction of processing of your personal information.
  • Data Portability: Request a copy of your data in a structured, commonly used, and machine-readable format.
  • Object: Object to the processing of your personal information based on legitimate interests.
  • Withdraw Consent: Where processing is based on consent, you may withdraw your consent at any time without affecting the lawfulness of prior processing.
  • Opt-Out of Analytics: You can limit analytics data collection by adjusting your device settings or contacting us.
  • Music Library Access: You can revoke music library access at any time through your device settings. The music import feature will not be available without this access.
  • Lodge a Complaint: If you are in the EEA or UK, you have the right to lodge a complaint with your local data protection supervisory authority.

To exercise any of these rights, please contact us at support@appcellent.co.

Children's Privacy

The App is not intended for 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 personal information from a child under 13, we will take steps to delete that information promptly. If you believe a child under 13 has provided us with personal information, please contact us at support@appcellent.co.

International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. These countries may have data protection laws that differ from those in your jurisdiction. By using the App, you consent to the transfer of your information to such countries.

Changes to This Privacy Policy

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 policy. We encourage you to review this Privacy Policy periodically for any changes. Your continued use of the App after any modifications constitutes your acceptance of the updated policy.

Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at:

Appcellent Yazilim Hizmetleri A.S.
Cumhuriyet Mah. Fatih Sultan Mehmet Blv. Cadde 224 A Blok No: 41 A/A
Nilufer / Bursa, Turkey
Email: support@appcellent.co