Comparison

OnStem vs StemScriber

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

StemScriber

This music app isolates individual instruments from songs, allowing users to slow down playback without altering pitch. It also provides chord charts and a built-in tuner to aid in learning and practicing music.

Highlights
  • Isolate any instrument
  • Slow down tempo without pitch change
  • Generate chord charts
  • Built-in tuner and fretboard
  • Practice music by ear
Features
Read full description

Learn any song the way you actually practice it. StemScriber pulls a song apart into its separate instruments so you can hear exactly what you're trying to play — then slows it down so you can keep up. What it does: • Isolate any instrument — mute the vocals and band, solo just the guitar (or bass, drums, piano, vocals). Finally hear the part that was buried in the mix. • Slow it down — drop the tempo without the pitch turning to chipmunks. Sit with a fast riff at half speed until it's under your fingers. • See the chords — a chord chart is generated for the song so you can follow the changes while you play. • Tuner + fretboard — built-in, free, no sign-up. Made for the way musicians really learn — by ear, slowed down, one part at a time. Whether you're working up a cover, learning a solo, or figuring out a bass line, StemScriber gets you from hearing it to playing it faster. Use it with music you own or have the rights to. Chord detection is a strong starting point, not a perfect transcription — it gets you playing fast, and you can trust your ears for the rest. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://stemscriber.com/privacy.html

Screenshots

OnStem3 screens
StemScriber4 screens

Verdict

The call

The clearest difference is ads: StemScriber at none against OnStem's shown. StemScriber also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (15.0 vs 18.0). On price, in-app purchases 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 and StemScriber sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

OnStem ships an update every 3 weeks, StemScriber weekly. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 6 level
OnStem versus StemScriber: the parameters behind the verdict, then further details
ParameterOnStemStemScriber
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 weeksWeekly — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size137 MB119 MB
Age rating4+4+
Developer阳 刘Jeffrey Kozelski

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
3 purchases

StemScriber

Subscriptions2
  • Pro Monthly$9.991 Month
  • Pro Annual$89.991 Year
One-time1
  • StemScriber Lifetime$199.99

Questions

Is OnStem free?
OnStem is free to download, with in-app purchases available.
Is StemScriber free?
StemScriber is free to download, with in-app purchases available.
Do OnStem or StemScriber have ads?
OnStem shows ads; StemScriber does not.
Which is updated more often, OnStem or StemScriber?
OnStem ships an update every 3 weeks, and StemScriber weekly. Most recently, OnStem was updated on October 12, 2026 and StemScriber on October 15, 2026.

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