Comparison

Stem Split vs Spiral Chorus

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

Head to head
About

Stem Split

This app separates any song into four audio stems: vocals, accompaniment, bass, and drums. All processing happens on your device, ensuring privacy and no uploads. You can then adjust the level, tempo, and pitch of these stems in real-time.

Highlights
  • Separate songs into 4 audio stems
  • On-device processing
  • Real-time level, tempo, and pitch adjustment
  • Import from Files app and iTunes
  • Supports WAV, AIFF, MP3, and MP4 formats
  • Export stems for sharing and other apps
Read full description

With Stem Split you can separate any song into 4 high quality stems: vocal, accompaniment, bass and drums. All processing takes place on your device, using an advanced neural network, ensuring your data stays on your phone. Import songs files from Files or from your iTunes library (non-DRM tracks only). Play back stems and adjust level, tempo and pitch in realtime. The imported song's stems are always accessible from within Files for easy sharing or import into other audio apps. Supported audio input formats include: WAV, AIF, MP3 and MP4. Stems can be saved in AAC format to save space or uncompressed WAV format for highest quality.

About

Spiral Chorus

This music effect plugin offers an analog-modeled LCR chorus with touch-friendly controls and immersive 3D visuals. It seamlessly integrates into DAWs for iOS, adding depth and texture to various music productions.

Highlights
  • Analog Modeled LCR Chorus
  • Touch-Friendly Controls
  • Immersive 3D Visuals
  • Versatile Music Application
  • Optimized for iOS
  • Seamless DAW Integration
Features
Read full description

FX Forms #001 - Spiral Chorus from Wild Surmise Music, number one in the series of AUv3 FX plugins. Key Features: - Analog Modeled LCR Chorus: Delve into the rich, warm textures of an analog-modeled LCR (Left-Center-Right) chorus effect, bringing a new dimension to your tracks. - Touch-Friendly Controls: With an interface tailored for iOS, Spiral Chorus offers intuitive, touch-friendly controls. Effortlessly sculpt your sound with responsive sliders and xy pads, ensuring a seamless workflow. - Immersive 3D Visuals: Enhance your audio manipulation experience with captivating 3D visuals in the background. - Versatile Application: Whether you're working on dreamy soundscapes, dynamic beats, or cutting-edge experimental sounds, Spiral Chorus adds a layer of depth and texture to your music. - Optimized for iOS: Crafted specifically for the iOS environment, Spiral Chorus ensures a stable, high-performance experience on your favorite devices. 3D Visuals leverage SceneKit and Metal Shaders providing good visual performance on iOS devices. - Seamless Integration: Use Spiral Chorus seamlessly within your favorite DAW as an AUv3 plugin, fitting perfectly into your existing workflow.

Screenshots

Stem Split4 screens
Spiral Chorus1 screens

Verdict

The call

The clearest difference is rating: Spiral Chorus at 5.0 against Stem Split's 2.3. Spiral Chorus also leads on monetization model (free vs free with in-app purchases) and ratings volume (15 vs 4). Stem Split's advantage is review sentiment (100% vs 89%). On price, update cadence, ads and in-app purchases 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. Stem Split sells 1 one-off in-app purchase and Spiral Chorus sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Spiral Chorus holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 4 and 15 respectively. Written reviews complicate that: 100% of Stem Split's written reviews are positive against 89% of Spiral Chorus's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Stem Split ships an update every 17 months, Spiral Chorus every 15 months. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 5 level
Stem Split versus Spiral Chorus: the parameters behind the verdict, then further details
ParameterStem SplitSpiral Chorus
PriceFreeFree
Rating2.3 (4 ratings)5.0 (15 ratings) — better
Positive reviews100.0% of reviews — better88.9% of reviews
Number of ratings415 — better
Update frequencyEvery 17 monthsEvery 15 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS18.016.0 — better
Further details — not scored
Size179 MB12 MB
Age rating4+4+
DeveloperMellowmuse LtdTom Power

Customer experience

Stem Split

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Spiral Chorus

All ratings15 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive88.9%
Neutral11.1%
Negative0.0%

In-app purchases

1 purchases

Stem Split

One-time1
  • Vocal Split$3.99
3 purchases

Spiral Chorus

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$9.99

Questions

Is Stem Split free?
Stem Split is free to download, with in-app purchases available.
Is Spiral Chorus free?
Spiral Chorus is free to download, with in-app purchases available.
Which has better reviews, Stem Split or Spiral Chorus?
Spiral Chorus is rated higher. Stem Split averages 2.3 out of 5 from 4 ratings, while Spiral Chorus averages 5.0 from 15 ratings.
Do Stem Split or Spiral Chorus have ads?
Neither Stem Split nor Spiral Chorus shows ads.
Which is updated more often, Stem Split or Spiral Chorus?
Stem Split ships an update every 17 months, and Spiral Chorus every 15 months. Most recently, Stem Split was updated on September 15, 2026 and Spiral Chorus on September 10, 2026.

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