Comparison

OnStem vs Song Separator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OnStem

Features
Read full description

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.

About

Song Separator

This application uses advanced audio processing to separate a song into its individual components. You can isolate vocals, drums, bass, and other instruments into separate files for further editing or analysis.

Highlights
  • Split songs into individual audio tracks
  • Separate vocals
  • Isolate drums
  • Extract bass lines
  • Extract other instruments
  • Advanced audio processing algorithms
Features
Read full description

Song Separator is a modern application that can split a song into individual audio tracks. Using advanced audio processing algorithms, it allows you to separate vocals, drums, bass, and other instruments into standalone files.

Screenshots

OnStem3 screens
Song Separator3 screens

Verdict

The call

The clearest difference is in-app purchases: Song Separator at none against OnStem's 4. On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OnStem sells 4 in-app purchases, starting at $0.99 per month. Song Separator asks for nothing beyond the download.

UpkeepUpdate frequency

OnStem ships an update every 3 weeks, Song Separator monthly. The most recent releases landed on September 9, 2026 and September 15, 2026 respectively.

Scorecard1 real difference · 9 level
OnStem versus Song Separator: the parameters behind the verdict, then further details
ParameterOnStemSong Separator
PriceFreeFree
Rating3.0 (1 ratings) — better
Positive reviews0.0% of reviews
Number of ratings1 — better
Update frequencyEvery 3 weeks — betterMonthly
AdsYesYes
In-app purchasesYesNo — better
MonetizationAd-supported
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.0 — better18.4
Further details — not scored
Size137 MB13 MB
Age rating4+4+
Developer阳 刘Xssemble s.r.o.

In-app purchases

4 purchases

OnStem

Subscriptions3
  • OnStem Pro – Monthly$0.991 Month
  • OnStem Pro – Quarterly$2.393 Months
  • OnStem Pro – Annual7 Days trial$8.991 Year
One-time1
  • OnStem Pro – Lifetime$9.99
None

Song Separator

No in-app purchases

Questions

Is OnStem free?
OnStem is free to download, with in-app purchases available.
Is Song Separator free?
Song Separator is free to download, with no in-app purchases.
Do OnStem or Song Separator have ads?
Both OnStem and Song Separator show ads.
Which is updated more often, OnStem or Song Separator?
OnStem ships an update every 3 weeks, and Song Separator monthly. Most recently, OnStem was updated on September 9, 2026 and Song Separator on September 15, 2026.

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