Equalizer Privacy Policy

Equalizer & Bass Booster - Privacy Policy

Last updated: April 23, 2026

Developer: Steel Horizon Studio

Contact: steelhorizonstudio@gmail.com

Overview

This policy explains what data the Equalizer & Bass Booster app collects, how it's used, and your rights over it. All audio processing happens on your device. We collect only the minimum data required to deliver the app's features and prevent piracy.

Data Stored on Your Device

The app stores the following in private app storage (removed on uninstall):

• Your equalizer settings and custom presets

• Your selected UI style

• App install timestamp and app-open counts (for review prompt timing)

• Your Google Play purchase token and order ID (issued by Google Play when you buy premium)

• A randomly generated device install identifier (not linked to your Google account)

• A short-lived signed entitlement token (valid for 30 days)

• A flag indicating whether premium is active

Data Transmitted to Our Server

To verify premium purchases and prevent piracy, the app sends limited data to our validation server at most once per 30 days per device, or when you purchase premium:

• Your Google Play purchase token

• The product identifier and app package name

• Your device install identifier

Our server forwards the token to the Google Play Developer API to confirm the purchase is valid, then returns a signed entitlement to your device.

Each verification is recorded in a private log containing: timestamp, device install identifier, Google Play order identifier, a hashed version of the purchase token, your IP address, and your user-agent string. Logs are retained for 180 days, then automatically deleted. They are used solely to detect fraud (such as a single purchase being shared across many devices) and are never sold or used for advertising.

Our server is hosted outside the European Economic Area, in a jurisdiction recognised by the European Commission as providing adequate data protection.

Third-Party Services

We use the following services to deliver the app. Each may process data as described in their own privacy policies:

• Google Play Billing - processes your purchases.

• Google Play Developer API - validates your purchase on our server's behalf.

• Google AdMob - displays ads to free users only. Not initialised for premium users.

• Google User Messaging Platform - collects your GDPR consent for ad personalisation (free users in the EEA only).

Permissions

• Modify audio settings / record audio - required by Android's audio effects framework (we do not record, store, or transmit microphone input)

• Foreground service / notifications - keeps the audio engine running with a visible notification

• Internet / network state - for ads, purchase validation, and Google Play Billing

• Advertising ID - used by Google AdMob for free users

• Bluetooth connect - detects connected headphones for AutoEQ suggestions

Data Retention and Deletion

• On your device: removed when you uninstall the app

• On our server: verification logs automatically deleted after 180 days; to request earlier deletion, email us with your device install identifier

• Ad data: governed by Google AdMob's policies

Security

Communication between the app and our server is encrypted in transit. Purchase tokens are hashed before being written to server logs. Entitlement tokens are cryptographically signed.

Your Rights

Under GDPR and similar laws, you have the right to access, correct, or delete your data, withdraw ad-personalisation consent (in-app, for EEA users), and lodge a complaint with your local data protection authority. Contact us using the address below.

Children

This app is not directed at children under 13. We do not knowingly collect data from children.

Changes to This Policy

We will update the "Last Updated" date above if we make material changes.

Contact

steelhorizonstudio@gmail.com