Comparison

AudioStretch vs Pitch Shift (Key Change)

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

Head to head
About

AudioStretch

This tool allows musicians to slow down, loop, and transpose music from audio or video files. It's designed to help users learn songs by ear, experiment with sounds, or simply explore their music library in new ways.

Highlights
  • Import audio or video files
  • Capture video with phone camera
  • Change speed without changing pitch
  • Transpose any music
  • Loop difficult sections
  • LiveScrub waveform listening
  • Keyboard/spectrum transcription aid
Features
Currently charting
Read full description

Before you buy AudioStretch, consider first downloading AudioStretch Lite for FREE. Apart from some feature limitations, it's the same as the full (paid) version. The Lite version is a great way to see whether AudioStretch works well for you. As a musician one of the most helpful tools you can have is the ability to slow-down, loop or auto-transpose the notes for a piece of music you are trying to learn. AudioStretch is the world’s first audio and video transcription tool. Now you can manipulate the pitch, speed and transcribe your tunes from both audio and video files; or by using your phone’s camera you can capture video directly into AudioStretch and transcribe it! FEATURES INCLUDE: • Import audio or video files • Capture video with your phone camera for transcription • Change the speed of files without changing the pitch • Listen to the individual notes as you drag the waveform • Play audio and video at zero speed • Transpose any music • Loop difficult to learn sections With AudioStretch you get all of this in an incredibly responsive and easy-to-use app. Ideal for transcription, learning songs by ear, crazy sonic experimentation, or just listening to your music library in a new way. DETAILED FEATURES: • Load songs from your Music Library. (Note: songs from Apple Music have DRM and therefore cannot be loaded). • Document Picker import/export option supports iCloud, OneDrive, and more • Open Dropbox files and email attachments via "Open In" • LiveScrub™ : listen as you drag/hold the waveform • Speed range -10x to 10x, including zero speed! • Instant freeze to zero speed by double-tapping on speed display • Pitch shift range +/- 36 semitones • Keyboard/spectrum feature for transcription • Super-fine speed/pitch adjustment via drag left-right on speed/pitch display • Flexible looping feature • No ads or in-app purchases If you run into any problems with AudioStretch or AudioStretch Lite, please contact support@audiostretch.com

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. ================================================

Screenshots

AudioStretch4 screens
Pitch Shift (Key Change)2 screens

Verdict

The call

The clearest difference is price: Pitch Shift (Key Change) at Free against AudioStretch's $9.99. AudioStretch's advantage is review sentiment (89% vs 50%) and in-app purchases (none vs 2). On rating, ratings volume, update cadence 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; AudioStretch costs $9.99 up front. Pitch Shift (Key Change) sells 2 one-off in-app purchases. AudioStretch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for AudioStretch against 4.4 for Pitch Shift (Key Change). Both are backed by a comparable volume of ratings — 230 and 85 respectively. Written reviews are what separate them: 89% of AudioStretch's written reviews are positive against 50% of Pitch Shift (Key Change)'s.

UpkeepUpdate frequency

AudioStretch ships an update every 3 months, Pitch Shift (Key Change) every 2 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

Scorecard7 real differences · 4 level
AudioStretch versus Pitch Shift (Key Change): the parameters behind the verdict, then further details
ParameterAudioStretchPitch Shift (Key Change)
Price$9.99Free — better
Rating4.4 (230 ratings)4.4 (85 ratings) — better
Positive reviews88.5% of reviews — better50.0% of reviews
Number of ratings230 — better85
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#63 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size18 MB5 MB
Age rating4+4+
DeveloperCognosonic Pte LtdLoop-Sessions.LLC.

Customer experience

AudioStretch

All ratings223 ratings
Positive83.9%
Neutral6.3%
Negative9.9%
Written reviews410 reviews
Positive88.5%
Neutral5.1%
Negative6.3%

Pitch Shift (Key Change)

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

In-app purchases

None

AudioStretch

No in-app purchases

2 purchases

Pitch Shift (Key Change)

One-time2
  • 31 bands equalizer$0.99
  • Always remove banner ads.$2.99

Questions

Is AudioStretch free?
AudioStretch costs $9.99, with no in-app purchases.
Is Pitch Shift (Key Change) free?
Pitch Shift (Key Change) is free to download, with in-app purchases available.
Which has better reviews, AudioStretch or Pitch Shift (Key Change)?
Pitch Shift (Key Change) is rated higher. AudioStretch averages 4.4 out of 5 from 230 ratings, while Pitch Shift (Key Change) averages 4.4 from 85 ratings.
Do AudioStretch or Pitch Shift (Key Change) have ads?
Pitch Shift (Key Change) shows ads; AudioStretch does not.
Which is updated more often, AudioStretch or Pitch Shift (Key Change)?
AudioStretch ships an update every 3 months, and Pitch Shift (Key Change) every 2 months. Most recently, AudioStretch was updated on October 23, 2026 and Pitch Shift (Key Change) on October 22, 2026.

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