1Introduction
This Privacy Policy explains how Audio Splitter Pro (the "App", "we", "our") handles information when you use the App on your Android device. We built the App so that your audio files are processed privately on your phone. By using the App you agree to the practices described below.
2Information we do not collect
We do not:
- require you to create an account or provide your name, email address or phone number;
- upload, copy, store or have access to the audio files you select or the stems the App creates;
- collect your precise or approximate location, contacts, photos or camera data. The microphone is used only when you tap the record button, and the recording stays on your device (see section 4);
- sell your personal information to anyone.
3How the App works with your files
Audio processing
When you choose a song, the App reads it from your device and separates it into stems (such as vocals, drums, bass and other) using an AI model that runs locally on your phone. The song is not sent over the internet.
Storage on your device
Temporary working files and the stems in your in-app library are saved in the App's private storage on your device. When you export, files are saved to your Downloads/Stems folder. You can delete library items, or clear the App's data or uninstall the App, at any time to remove them.
Local settings
The App stores your preferences (for example performance and quality options) locally on your device. This information is not transmitted to us.
4Permissions the App uses
| Permission | Why it is needed |
|---|---|
| Audio / media files (READ_MEDIA_AUDIO, READ_EXTERNAL_STORAGE on older Android) | To let you browse and pick songs stored on your device for separation. Files are read only when you select them. |
| Microphone (RECORD_AUDIO) | Only when you tap the record button in the mixer, to record your own voice over a song. The recording is stored temporarily on your device, is never uploaded, and is deleted when you close the song. It is included in an exported file only if you export a mix. |
| Internet | To load ads through Google AdMob and, only if the bundled model cannot be used, to download the separation model. |
| Notifications | To show progress and completion while a song is being processed in the background. |
| Foreground service (data sync) | To keep the separation running reliably if you switch to another app. |
5The separation model
The AI separation model is delivered together with the App through Google Play, so separation works fully offline. In the rare case that the bundled model is missing, the App downloads it from a public hosting service (Hugging Face). Like any web download, the hosting service may receive technical information such as your IP address and device/network details as part of the request. No audio or personal content is sent in this request.
6Advertising (Google AdMob)
The App is free and shows ads (banner, interstitial and rewarded video) provided by Google AdMob. To show and measure ads, Google and its partners may collect and use certain data from your device, such as your advertising ID, IP address, device and app information, and ad interaction data. This is handled by Google under its own policies.
- Where required (e.g. EEA, UK), the App asks for your consent through Google's User Messaging Platform before ads are requested.
- You can change your choice later from the privacy options in the App's Settings when available.
- You can reset or delete your advertising ID, or opt out of ad personalization, in your Android settings (Settings → Privacy → Ads).
Learn more: How Google uses data from ads · Google Privacy Policy.
7Third-party components
The App uses the following third-party technology:
- Google Mobile Ads SDK (AdMob) – advertising, as described above.
- Google User Messaging Platform – collects your ad-consent choices.
- ONNX Runtime (Microsoft, MIT) – runs the model on your device.
- HT-Demucs (Meta, MIT) – the music source separation model.
The App does not include analytics or crash-reporting services of its own.
8Data sharing and retention
We do not receive your personal data and therefore do not sell, rent or share it. Data handled by Google AdMob is governed by Google's policies. Files stored by the App remain on your device until you delete them, clear the App's data or uninstall the App.
9Your rights and choices
- Delete any song, stem or library item from within the App at any time.
- Clear all App data or uninstall the App to remove everything it stored.
- Revoke the audio, notification or any other permission in your Android system settings.
- Manage or reset ad personalization and your advertising ID in your Android settings.
Depending on where you live (for example the EU/UK under GDPR, or California under CCPA/CPRA), you may have additional rights regarding data processed by third parties such as Google. Because we do not hold personal data about you, requests about advertising data should be directed to Google; you may also contact us and we will gladly help.
10Security
Because processing happens on your device and files are not uploaded, your audio is protected by your device's own security. We use secure HTTPS connections for any download. No method of electronic storage or transmission is 100% secure, but we do our best to minimize risk.
11Children's privacy
The App is not directed to children under 13 (or the minimum age required in your country), and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will address it.
12Your content and copyright
You are responsible for ensuring that you own the audio files you process or have all necessary rights and permissions to use them. The App is a tool and does not claim any rights over your content.
13Changes to this policy
We may update this Privacy Policy from time to time. The "Last updated" date at the top shows when it was last revised. Continued use of the App after changes means you accept the updated policy.
14Contact us
Questions or requests about this Privacy Policy? We're happy to help.
[email protected]