Effective Date: 05 June 2026
Last Updated: 05 June 2026
This Privacy Policy explains how the Bass Booster mobile application ("Volume Booster", "we", "us", or "our") collects, uses, and protects your information when you use our Android app (the "Service").
By installing or using Bass Booster, you agree to the terms of this Privacy Policy. If you do not agree, please do not use the app.
Bass Booster is published by the developer of the Bass Booster Android app. The simplest way to reach us is by email at dworarena@gmail.com, or via Settings → Privacy Policy inside the app.
We collect only the data needed to run, improve, and personalize Bass Booster.
When you sign in with Google or email, we collect:
Your email address
Your display name (if provided by Google)
The sign-in provider you used (Google, Email, or Anonymous)
A unique account identifier (UID) generated by Firebase Authentication
You can use Bass Booster without signing in by selecting "Continue as Guest" on the sign-in screen. In guest mode, no email or personally identifying account information is collected by our servers.
To power streaks, the Sound DNA personalization, the listening journal, and habit-time notification timing, we record:
Number of boost sessions and total active time
The audio profile you select most often (Music, Movie, Podcast, Gaming)
An hour-of-day histogram of when you typically listen
Daily streak count and peak streak
Loud-listening exposure minutes (for the hearing-protection feature)
Speaker Care session count
Calibration timestamps
Event markers: "free cap hit", "Sound DNA ready", subscription state changes
This data is stored under your Firebase UID if you are signed in, or only locally on your device (in Android SharedPreferences) if you are in guest mode.
If you subscribe to Bass Booster Premium, we record:
Your subscription status (active, trial, cancelled, expired, none)
Your plan (weekly or monthly)
Trial-end and expiration timestamps
The provider (Google Play)
Payments are processed entirely by Google Play Billing. We do not receive or store your payment card number, billing address, or any other financial information.
If you use the in-app Invite Friends feature, we record:
A stable per-install identifier (a randomly generated UUID — not your device's IMEI or advertising ID)
A Firebase UID that identifies the friend who invited you (if any)
The total count of friends you have invited
This lets us credit your reward when your friends install through your link. We do not collect or transmit your contact list, address book, or any information about anyone you invite.
To deliver and troubleshoot the Service, we collect basic technical metadata:
Device language (used to localize the app)
Android version and device model
Anonymous Firebase installation ID
Crash reports and anonymous analytics events (via Firebase Analytics)
Bass Booster does not record, store, or transmit your audio.
The app applies digital signal processing — equalization, bass boost, loudness enhancement, 3D virtualization — to the audio output of other apps on your device, in real time, entirely locally. No audio data leaves your device. No audio is captured or logged at any time during normal operation.
The optional Speaker Calibration feature (Premium) requests microphone access to play a controlled test tone through your speakers and measure the response. The microphone input is processed locally on your device; audio samples are not transmitted, stored, or retained after the calibration session ends.
We use your information to:
Provide the Service — apply audio enhancements, save your preferences, sync your subscription
Personalize the experience — Sound DNA learns your preferred profile, the dashboard surfaces your streak and milestones
Communicate with you — send transactional emails (welcome, weekly Sound DNA, trial-ending, etc.) if you have provided your email address. You can unsubscribe at any time.
Improve the app — anonymous crash and performance analytics inform development priorities
Process referrals — credit you and your friends when invites convert into installs
Maintain safety — the hearing-protection feature analyzes your listening exposure to warn you of risky levels
Comply with legal obligations — including responding to lawful requests from authorities
We do not sell or rent your personal data to advertisers or third parties.
Bass Booster uses the following third-party services. Each has its own privacy policy, which you should review:
Service
Purpose
Their privacy policy
Google Firebase Authentication
Account sign-in
firebase.google.com/support/privacy
Google Cloud Firestore
Account data sync
firebase.google.com/support/privacy
Firebase Analytics
Anonymous app analytics
firebase.google.com/support/privacy
Google Play Billing
Subscription processing
policies.google.com/privacy
Google Play Install Referrer
Referral attribution
policies.google.com/privacy
Google Sign-In (Credential Manager)
Sign-in option
policies.google.com/privacy
We do not share data with advertising networks. Bass Booster does not display third-party advertisements.
Your data is stored in Google Firebase data centers, which use industry-standard encryption at rest and in transit. We rely on Firebase Authentication tokens and Firestore Security Rules to ensure that only you and authorized server processes can read your account data.
Locally stored data (Android SharedPreferences) is sandboxed to the Bass Booster app and is not accessible to other apps on your device.
We take reasonable measures to safeguard your data, but no internet-connected service can guarantee absolute security.
Account data — retained until you delete your account (Settings → Delete Account), or up to 24 months of account inactivity, whichever comes first.
Anonymous usage data — retained for up to 24 months for service-improvement analysis.
Subscription data — retained for the lifetime of your subscription plus 5 years (for tax and refund handling).
Crash and analytics events — anonymized and retained per Firebase's default 14-month policy.
When you delete your account, all personally identifying data is removed from our active databases within 30 days. Anonymized aggregate statistics (e.g., "X total users boosted today") may be retained indefinitely.
Depending on where you live, you may have the following rights.
Right of access — request a copy of your data
Right of rectification — correct inaccurate data
Right of erasure ("right to be forgotten") — delete your account and data
Right to data portability — export your data in a machine-readable format
Right to object to processing
Right to withdraw consent at any time
Right to lodge a complaint with your local data-protection authority
Right to know what personal information we collect and how it is used
Right to delete personal information we hold about you
Right to correct inaccurate information
Right to opt out of the sale or sharing of personal information (we do not sell or share for behavioral advertising)
Right to non-discrimination for exercising any of these rights
Equivalent rights apply under your local data-protection law.
Open the app and go to Settings → Delete Account to erase your data with one tap. Alternatively, email us at dworarena@gmail.com — we will respond within 30 days.
Bass Booster is not directed at children under 13 (or under 16 in the European Economic Area). We do not knowingly collect personal information from children. If you believe a child has provided information to us, please contact us and we will delete it.
Your data may be transferred to and processed in countries other than your own, including the United States, where Google's Firebase infrastructure is hosted. We rely on Google Cloud's Standard Contractual Clauses and other lawful transfer mechanisms to protect your data when it crosses borders.
The app requests the following Android permissions and uses each as described:
Permission
Why we need it
MODIFY_AUDIO_SETTINGS
To apply equalizer, bass boost, loudness, virtualizer effects
VIBRATE
Haptic feedback synchronized with the bass
INTERNET, ACCESS_NETWORK_STATE, CHANGE_WIFI_STATE, ACCESS_WIFI_STATE
Required by Firebase and Google Play Billing
POST_NOTIFICATIONS (Android 13+)
To show daily streak reminders, tune-up nudges, and weekly Sound DNA notifications. You can disable any of these in Settings → Notifications.
BLUETOOTH_CONNECT (Android 12+)
To read the model name of your Bluetooth headphones when they connect, so we can suggest the right audio profile. Optional.
RECORD_AUDIO
Used only for the optional Speaker Calibration feature (Premium). The microphone is accessed only during the active 90-second calibration; audio is processed locally and discarded immediately afterward.
BILLING
Required for Google Play subscription purchases.
Bass Booster is a native Android app and does not use HTTP cookies. Firebase may use device identifiers and local-storage mechanisms in line with Google's privacy policy.
If you sign in with your email address, we may send you transactional emails related to:
Welcome and onboarding
Weekly Sound DNA reports
Streak reminders and milestone celebrations
Subscription updates (trial ending, renewal reminders, win-back after cancellation)
Account-security and privacy notifications
You can unsubscribe from non-essential emails using the unsubscribe link at the bottom of any message, or by deleting your account.
We may update this Privacy Policy from time to time. When we do, we will:
Update the "Last Updated" date at the top of this page
Notify you in the app the next time you open it for material changes
For substantial changes, request your renewed consent before continuing
For privacy questions, data-deletion requests, or any other concerns, email dworarena@gmail.com. We respond to all reasonable requests within 30 days.