The one-line version
What MonoBand can access
Audio files you import
When you import a song — from your files, your music library, a video, a share from another app, or a fresh recording — that audio is copied into the app's own private storage. Your device gates this access with the system file/media picker; we never read files you didn't explicitly choose.
Microphone (only when you record)
MonoBand asks for microphone access the first time you tap the record button, and again for Karaoke scoring. Your device shows its standard permission prompt, and the microphone is only active during an explicit recording or karaoke session. That audio is processed and saved on your device — it is not streamed or uploaded anywhere.
Photos / cover art (optional)
If you choose to set a custom cover image for a song, MonoBand uses your device's standard photo picker to read the single image you pick. We don't scan your library, we don't see other photos, and we don't keep any references after you've chosen.
What MonoBand does not do
- No servers for your content. MonoBand makes no network requests for stem separation, BPM/key detection, transpose, karaoke pitch analysis, lyric transcription, translation, or any other audio processing. All of it runs locally on your device. The only network use is the optional, one-time download of a couple of AI model files described under “Optional model downloads” below — and even then, none of your audio, lyrics, or personal data is ever uploaded.
- No analytics or telemetry. We don't track which features you use, how long sessions last, or anything else.
- No third-party tracking SDKs. No Facebook, Firebase, Google Analytics, advertising networks, or crash reporters that phone home. The open-source components we ship (such as the on-device AI model, its runtime, and the audio engine) run locally and collect nothing.
- No accounts or sign-in. There is no MonoBand account because there is no MonoBand backend to sign in to.
- No ads. No banners, no interstitials, no sponsored content of any kind.
Optional model downloads (Android)
Some on-device AI features rely on model files that are fetched once and then run fully offline. On Android, MonoBand declares the INTERNET permission for this single purpose:
- Lyrics transcription (whisper). The first time you open the Lyrics screen for a song, the app offers to download the speech-recognition model (about 150 MB) one time. After that, transcription runs entirely on your device.
- On-device translation (ML Kit). If you choose to translate lyrics into another language, a small language model (about 30 MB per language) is downloaded once for that language, then translation runs offline.
These downloads fetch only the model files themselves. No audio, no vocal stems, no lyrics, and no personal data are ever sent over the network — the recording and transcription never leave your device. The separation model that splits songs into stems ships inside the app, so it needs no download at all. If you never use the Lyrics feature, no model is downloaded.
Where your data lives
Imported songs, separated stems, recordings, project metadata, playback preferences, and section markers are all stored inside MonoBand's private app storage on your device. If your device is set up to back up app data — Apple's encrypted iCloud backup on iPhone/iPad/Mac, or your device/Google backup on Android — the operating system may include MonoBand's data in that backup. That is handled entirely under Apple's or Google's privacy terms, and we never see the contents.
Sharing and export
When you use the Share or Export button — to send a stem, an exported mix, a multitrack ZIP, or a recording to another app — your device hands the file to that app via the standard system share sheet. From that point on, the receiving app's privacy policy applies.
Children
MonoBand is suitable for users of any age and does not knowingly collect any personal information from anyone, including children. There is no account to create and no personal data is transmitted off the device.
Changes to this policy
If we ever change how MonoBand handles data, we'll update this page and bump the "Last updated" date at the top. Any change that would meaningfully reduce your privacy will be called out in the app before it takes effect.
Contact
Questions about this policy? Email contact@mono.band.