Privacy Policy

About the App & Developer

MediaTAG3 is a Flutter-based Android application that lets you view and edit the ID3 tags of MP3 files stored on your device — including title, artist, album, album artist, track number, disc number, year, genre, and album art. The app works entirely offline and only accesses the local file system on your device.

Information We Process

The table below describes all data MediaTAG3 reads or stores. Everything stays on your device — nothing is sent to any external server.

Information we do NOT collect

• Personal identifiers such as name, email address, or phone number
• Location data (GPS coordinates)
• Advertising identifiers (GAID, etc.)
• Usage analytics or crash reports
• Payment information
• Contents of any file other than the selected MP3 files

How We Use the Information

The data processed by the app is used exclusively for the following purposes:

• Tag editing: Reading and writing ID3 tags directly to the MP3 files you select
• Album art editing: Embedding an image chosen or cropped from your gallery into the MP3 file
• Convenience: Restoring the last opened folder when you relaunch the app
• User experience: Persisting your dark/light theme preference
• Batch editing: Applying common tags across multiple files, or converting between file names and tag fields

No data is used for marketing, advertising, profiling, or any secondary purpose.

Data Storage & Retention

SharedPreferences (app-internal storage)

• is_dark — dark mode toggle (true / false)
• last_folder_path — path of the last folder you opened
• mp3tag_cache_<file-path> — per-file tag edit backup cache (JSON)

File system

• Edited tag data is written directly into the ID3 tag area of each MP3 file.
• Extracted album art thumbnails are temporarily stored in a .mp3tag_cache/ directory inside the selected folder.

Uninstalling the app causes the system to automatically delete all SharedPreferences data, including settings and tag caches. Tags written into MP3 files persist as long as those files exist; you can remove or modify them at any time using MediaTAG3 or any other tag editor.

Third-Party Sharing & External Transmission

The following services are not used in MediaTAG3:

• Analytics SDKs (Firebase, Google Analytics, etc.)
• Advertising networks (AdMob, etc.)
• Crash-reporting services (Crashlytics, Sentry, etc.)
• Cloud storage or backend APIs
• Social login or account linking
• External font servers (Google Fonts CDN, etc.)

App Permissions

The following Android permissions are requested by MediaTAG3 and the reason each is needed:

Each permission is requested only when the relevant feature is used. Denying a permission disables that specific feature but does not affect the rest of the app.

How MP3 Files Are Accessed & Edited

Reading tags

When you select a folder, the app scans for .mp3 files and uses the flutter_audio_tagger library to read each file's ID3 tags (v1–v2.4) and embedded album art. The data is held in app memory and a local cache only.

Writing tags

When you save your edits, flutter_audio_tagger writes the updated tags directly into the ID3 area of the MP3 file. Afterwards, an Android media scanner is triggered to refresh the system media database.

Batch editing features

• Batch tag apply: Apply a common album, artist, genre, or other field to multiple selected files at once
• Auto track numbering: Assign sequential track numbers to selected files based on their list order
• File name → tag: Parse filenames in Artist - Title.mp3 format and populate the corresponding tag fields automatically
• Tag → file name: Rename files to Artist - Title.mp3 format based on existing tag data
• Clear tags: Remove all tag fields from selected files

Children's Privacy

MediaTAG3 is not directed at children under the age of 13, and we do not knowingly collect personal information from children. If a child under 13 uses the app, a parent or guardian should supervise their use.

Deleting Your Data

To remove data stored by the app, use any of the methods below:

• Clear app data: Device Settings → Apps → MediaTAG3 → Storage → Clear Data (removes theme preference, last folder path, and all tag caches)
• Uninstall the app: Uninstalling automatically deletes all SharedPreferences data.
• Album art cache files: The .mp3tag_cache/ folder inside each MP3 folder can be deleted with any file manager.
• Tags inside MP3 files: Use MediaTAG3's "Clear Tags" feature or any other tag editor to remove tags written to your files.

Changes to This Policy

This policy may be updated when the app is updated or when applicable laws change. Material changes will be announced through app store release notes or an in-app notice. Updated policies take effect 7 days after the announcement date.

Contact

If you have any questions about this privacy policy, please reach out: