OnStem: Local music split
On-device AI music separation
Free · In‑App Purchases
OnStem: AI Music Separation is an on-device AI-powered music separation tool that allows you to split audio tracks into individual stems with privacy and performance in mind.
Powered by optimized local inference based on the open-source Spleeter project, OnStem performs all audio processing entirely on your device, without uploading files to any server.
Key Features
AI Music Separation
Separate audio into 2 stems: Vocal and Accompaniment
Separate audio into 5 stems: Vocal, Piano, Drums, Bass, and Accompaniment
On-Device AI Processing
All processing runs locally using on-device AI models
No audio files are uploaded or shared
Your content stays private on your device
Optimized for Long Audio
Custom optimizations allow processing of very long audio files
Designed for stability and efficiency on mobile devices
Multiple Export Formats
Export separated tracks as MP3, WAV, M4A, or AAC
Easily integrate with other audio tools and workflows
Privacy First
OnStem is a local-first application.
All selected files are processed on your device only.
No audio data or personal information is collected, stored, or uploaded.
Subscriptions and Purchases
OnStem offers both subscription plans and a one-time purchase option.
Monthly subscription
Quarterly subscription
Annual subscription
One-time lifetime purchase (where available)
Payment will be charged to your Apple ID account at confirmation of purchase.
Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period.
You can manage or cancel your subscription at any time in your Apple ID account settings.
Prices may vary by region and are displayed before purchase.
Legal
Privacy Policy
https://github.com/yangliu-1995/stemify-legal/blob/main/Privacy-Policy/EN.md
Terms of Use
https://github.com/yangliu-1995/stemify-legal/blob/main/Term-of-Use/EN.md
OnStem is designed for creators who value privacy, performance, and on-device AI processing.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fix crash
The developer, 阳 刘, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 阳 刘
- Size
- 143.9 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 17 more
- English, Arabic, Czech, Finnish, French, German, Italian, Japanese, Korean, Polish, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
User-Generated Content
- In-App Purchases
Yes
- OnStem Pro – Annual $8.99
- OnStem Pro – Quarterly $2.39
- OnStem Pro – Lifetime $9.99
- OnStem Pro – Monthly $0.99
- Copyright
- © 2025 OnStem
