Comparison

Pitch Shift (Key Change) vs Zero Chorus

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

Head to head
About

Pitch Shift (Key Change)

This music player allows real-time pitch shifting and a 31-band equalizer. It supports AUv3 effects, loop playback, and exporting processed audio. Import audio files from other apps or your music library.

Highlights
  • Real-time pitch shifting
  • 31-band equalizer
  • AUv3 effects support
  • A-B loop playback
  • Center Cancel/Emphasis
  • Audio file export
  • Background playback
Read full description

[ Important Notice ] With this version (7.0.0), we are ending regular updates for this app. You can continue using this app, but future development and updates will continue in 'Audio Unit Player', which includes this app's functionality. 'Audio Unit Player' is a free app that supports both speed and pitch adjustment and includes a 31-band equalizer with no band restrictions. Data Transfer: File information registered in this app is not transferred automatically to 'Audio Unit Player'. Use the Files app to manually copy any files you need."; ================================================ This app is a music player that can process the following effects in real time. - Pitch shift (-1 ~ +1 octave) - 31 band equalizer (required In-App Purchase) - Reverb - AUv3 (Audio Unit v3) host If you play a musical instrument or sing a song, this app should be supported by you higher / lower the pitch. [Function] - Perform pitch shift in real time (-12 - +12). - 31 bands EQ (Hz: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k). (Initiality, only 3 bands are available. It's possible to use 31 bands by In-App Purchase.) - EQ preset (Abundant Built-in Presets / Custom Presets) (required In-App Purchase). - Reverb: Adjustable decay time (Low freq, High freq) / 13 presets - Reverb preset (Built-in Presets / Custom Presets) - Can be used as an AUv3 host. - A-B loop playback. - Center Cancel / Center Emphasis. - Lch, Rch each mute. - Quick fast forward, rewind (specify the number of seconds). - Check and set current position graphically in wave view. - Supports Auto-Lock ON/OFF. - Supports background playback. - Supports export (file writing) function (Each effect (pitch/EQ) value set for each song is also reflected. The range specified in the loop section is output.) In addition to loading music data included in the standard "music" app, it also supports the function to import audio files from other apps ("Voice Memos" etc.). [How to import from "Voice Memos"] 1. Start the app "Voice Memos" and tap the mark "..." of the file to be imported from the list. 2. Tap "Share" on the sheet displayed from the bottom. 3. Tap "More" found by scrolling the displayed list of sharing destination apps to the right. 4. Select "Pitch Shift" if available. The file is copied to this app. ================================================ [Note 1] This application will not be able to read songs of the following formats. - Songs from Apple Music, iCloud, iTunes Match - Songs that are protected by digital copyright (DRM) [Note 2] Depending on the state of your device, your custom AUv3 effects may not appear in the list. As a solution, you can solve the problem by starting "GarageBand" once and restarting this app. ================================================

About

Zero Chorus

This audio effect plugin provides a high-quality chorus inspired by the Roland Dimension D, offering a versatile sound without muddy low end. It integrates seamlessly with iOS DAWs and supports expanded controls for easy tweaking.

Highlights
  • Roland Dimension D style chorus
  • Feedback control for flanging
  • AUv3 audio unit extension
  • Expanded touch controls
  • Desktop quality algorithm
  • Thickens guitar and synth parts
Read full description

Looking for a rich chorus effect without a muddy low end? Zero Chorus is a high quality Roland Dimension D style chorus plug-in. The addition of a feedback control improves versatility by enabling flanging effects. Zero Chorus is an Audio Unit Extension (AUv3) that works inside host apps. Just open up your favorite host that supports Audio Units and add it as an effect. The controls expand when touched so they can be easily seen while tweaking. Zero Chorus brings a superb chorus algorithm to your favorite iOS DAW. Compatible with GarageBand, Cubasis, Auria, BeatMaker, AudioBus, AUM, Modstep, and more. Blamsoft brings their experience creating top notch plug-ins for the desktop to iOS. The same algorithm is found in the popular Zero Hybrid Synthesizer Rack Extension for Propellerhead Reason. The available parameters allow you to dial in a wide variety of chorus effects, from transparent to heavy. It's great for thickening electric guitar or synth parts. You get a desktop quality algorithm at an iOS friendly price. Tap Developer Website for sound examples. Note: Second screenshot shows the effect of touching a control.

Screenshots

Pitch Shift (Key Change)2 screens
Zero Chorus2 screens

Verdict

The call

The clearest difference is price: Pitch Shift (Key Change) at Free against Zero Chorus's $2.99. Pitch Shift (Key Change) also leads on update cadence (every 2 months vs every 6 months) and rating (4.4 vs 4.2). Zero Chorus's advantage is in-app purchases (none vs 2) and ads (none vs shown). On review sentiment 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

Pitch Shift (Key Change) is free to download; Zero Chorus costs $2.99 up front. Pitch Shift (Key Change) sells 2 one-off in-app purchases. Zero Chorus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Pitch Shift (Key Change) holds the better App Store score, 4.4 against 4.2. Both are backed by a comparable volume of ratings — 85 and 22 respectively. Written reviews point the same way: 50% of Pitch Shift (Key Change)'s written reviews are positive against 43% of Zero Chorus's.

UpkeepUpdate frequency

Pitch Shift (Key Change) ships an update every 2 months, Zero Chorus every 6 months. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

Scorecard8 real differences · 2 level
Pitch Shift (Key Change) versus Zero Chorus: the parameters behind the verdict, then further details
ParameterPitch Shift (Key Change)Zero Chorus
PriceFree — better$2.99
Rating4.4 (85 ratings) — better4.2 (22 ratings)
Positive reviews50.0% of reviews — better42.9% of reviews
Number of ratings85 — better22
Update frequencyEvery 2 months — betterEvery 6 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.012.0 — better
Further details — not scored
Size5 MB15 MB
Age rating4+4+
DeveloperLoop-Sessions.LLC.Blamsoft, Inc.

Customer experience

Pitch Shift (Key Change)

All ratings85 ratings
Positive83.5%
Neutral3.5%
Negative12.9%
Written reviews62 reviews
Positive50.0%
Neutral12.9%
Negative37.1%

Zero Chorus

All ratings22 ratings
Positive77.3%
Neutral4.5%
Negative18.2%
Written reviews21 reviews
Positive42.9%
Neutral4.8%
Negative52.4%

In-app purchases

2 purchases

Pitch Shift (Key Change)

One-time2
  • 31 bands equalizer$0.99
  • Always remove banner ads.$2.99
None

Zero Chorus

No in-app purchases

Questions

Is Pitch Shift (Key Change) free?
Pitch Shift (Key Change) is free to download, with in-app purchases available.
Is Zero Chorus free?
Zero Chorus costs $2.99, with no in-app purchases.
Which has better reviews, Pitch Shift (Key Change) or Zero Chorus?
Pitch Shift (Key Change) is rated higher. Pitch Shift (Key Change) averages 4.4 out of 5 from 85 ratings, while Zero Chorus averages 4.2 from 22 ratings.
Do Pitch Shift (Key Change) or Zero Chorus have ads?
Pitch Shift (Key Change) shows ads; Zero Chorus does not.
Which is updated more often, Pitch Shift (Key Change) or Zero Chorus?
Pitch Shift (Key Change) ships an update every 2 months, and Zero Chorus every 6 months. Most recently, Pitch Shift (Key Change) was updated on September 21, 2026 and Zero Chorus on September 18, 2026.

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