Privacy Policy¶

Last updated: June 13, 2026

Thank you for using Flow Equalizer ("the App"), developed by Androxus ("we," "us," or "our"). This Privacy Policy explains what data we collect, how we use it, and your choices regarding your information.

The App works fully on your device. A few optional features — Google Drive backup and profile sharing — involve sending data off your device only when you choose to use them, and are explained in their own sections below.

Data We Collect¶

Data Stored Locally on Your Device¶

The following data is created and stored on your device. We do not have access to it, and it is never sent to Androxus servers:

Audio Settings — Equalizer bands, bass boost, virtualizer, volume booster, limiter, and channel balance preferences
Custom Presets — Any presets you create or modify
Device Profiles — Audio profiles linked to specific Bluetooth or wired audio devices
Listening History — Song title, artist, album name, album art, duration, and which music player was used. This data powers the Listening Stats feature and stays on your device.
Liked Songs — Songs you mark as liked within the app
App Preferences — Theme, language, notification settings, and other app configuration

If you enable Google Drive Backup (see below), a copy of this data is saved to your own private Google Drive folder. If you use Profile Sharing (see below), only the audio settings of the profile you choose to share are uploaded.

Google Drive Backup & Restore¶

Flow Equalizer offers an optional backup feature so you can move your settings to a new device or recover them after reinstalling. This feature is off until you turn it on.

What is backed up — A single snapshot containing your custom presets, equalizer and effect preferences, saved Bluetooth/wired device profiles, auto-apply rules, listening history, and liked songs.
Where it is stored — In your own private Google Drive app data folder, using Google's restricted drive.appdata scope. This is a hidden, app-specific area of your Google account. The backup is not sent to or stored on Androxus servers.
Our access — We cannot read the contents of your Google Drive or any other files in it. The drive.appdata scope only lets the App read and write its own backup file.
Account access — When you set up backup, Android asks you to choose a Google account and grant permission. You can revoke this access at any time at myaccount.google.com/permissions.
Auto-backup — If enabled, the App periodically backs up in the background (only while charging and connected to a network). You can set the cadence to Off, Daily, or Weekly.
Deleting your backup — You can disable backup in the App's settings, switch accounts, or delete the backup file from your Google Drive. Uninstalling the App does not automatically delete an existing Drive backup.

You can also export and import this same snapshot to a local file on your device, which never leaves your device unless you share that file yourself.

Flow Equalizer lets you optionally share an equalizer profile with others via a link (for example, eq.androxus.com/s/...). This only happens when you explicitly choose to share a profile.

What is uploaded — Only the audio configuration of the profile you share: equalizer band values, effect settings (such as bass boost and virtualizer), and a profile label. This is uploaded to our backend (api.eq.androxus.com).
What is not uploaded — No account details, no listening history, no liked songs, and no personal information are attached to a shared profile.
Public links — Anyone with the link can open the shared profile. Do not include personal or sensitive information in profile labels.
Deletion — If you would like a shared profile removed, contact us at [email protected].

Data Collected by Third-Party Services¶

We use the following third-party services that may collect data:

Google Firebase Analytics

Collects anonymous usage data such as app opens, feature usage, and session duration
Used to understand how features are used and improve the app
Firebase Privacy Policy

Google Firebase Crashlytics

Collects crash reports including device model, OS version, and stack traces
Used to identify and fix bugs
Crashlytics Data Collection

Google Firebase Remote Config

Delivers configuration and feature flags so we can adjust the app's behavior without an update
Does not collect personal information
Firebase Privacy Policy

Google AdMob

Displays ads to free users (removed for premium users)
May collect device identifiers, IP address, and ad interaction data
Google Ads Privacy Policy

Google Play Billing

Processes in-app purchases and subscriptions
Purchase transactions are handled entirely by Google Play
Google Play Terms of Service

Google User Messaging Platform (UMP)

Manages ad consent preferences in compliance with GDPR and other regulations

Permissions We Request¶

Permission	Why We Need It
Modify Audio Settings	Core functionality — applies equalizer and audio effects
Internet	Required for ads, analytics, crash reporting, license verification, Google Drive backup, and profile sharing
Foreground Service	Keeps audio effects active while the app is in the background
Notification Permission	Shows equalizer status in the notification bar
Boot Completed	Optionally restarts the equalizer service after device reboot
Notification Listener	Detects which music player is active to automatically connect the equalizer
Google Account (Drive)	Optional — only when you enable backup, to save and restore your settings in your own private Google Drive app folder
Storage (legacy)	Used on older Android versions for backup and restore functionality

How We Use Your Data¶

Improve the app — Analytics help us understand which features are used and where users encounter issues
Fix crashes — Crashlytics reports help us identify and resolve bugs quickly
Display ads — AdMob shows ads to free users to support development
Process purchases — Google Play Billing handles premium subscriptions and one-time purchases
Back up your settings — When you enable it, to save a copy of your settings to your own Google Drive
Share profiles — When you choose to, to generate a shareable link for an equalizer profile

We do not sell your personal data. Data is shared only with the third-party services listed above for the purposes described, or as a direct result of an action you take (uploading a backup to your own Google Drive, or generating a shareable profile link). We do not have access to your listening history, liked songs, or audio settings — these remain on your device or in your own private Google Drive.

Data Retention and Deletion¶

Local data — You can clear all app data through your device's Settings > Apps > Flow Equalizer > Clear Data, or by uninstalling the app
Listening history — Can be cleared within the app's Listening Stats settings
Google Drive backup — Disable backup in the app, switch accounts, or delete the backup file from your Google Drive; you can also revoke the app's Drive access at myaccount.google.com/permissions
Shared profiles — Contact [email protected] to request removal of a shared profile
Analytics data — Retained by Firebase according to their data retention policies
Ad data — Managed by Google according to their privacy policies

Children's Privacy¶

Flow Equalizer is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13.

Security¶

All data transmitted between the app and third-party services is encrypted in transit using HTTPS. Local data is stored in your device's private app storage, accessible only to the app. Google Drive backups are stored in your account's protected app data folder.

Changes to This Policy¶

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated date. Continued use of the app after changes constitutes acceptance of the updated policy.

Contact Us¶

If you have questions about this Privacy Policy, contact us at [email protected].

For more information, visit androxus.com.