Comparison

Pitch Shift (Key Change) vs tc.audio

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

tc.audio

Adjust playback speed, pitch, and loop sections of audio files. Ideal for learning music or languages by allowing focused listening and repetition.

Highlights
  • Playback speed control
  • Repeat and loop playback
  • Pitch alteration (semitone transposition)
  • Seek and playback navigation
  • Shuffle play
Features
Read full description

: : Product Function - Playback Speed Control (Play Speed Change, Music Speed Change) - Repeat and Loop Play, Shuffle Play (Random Play) - Pitch Alteration (Transposition by Semitone) - Seek (Skip and Jump to Position and Playback Navigation) : : Use and Application - Music Listening and Learning (Guitar Copy etc.) - Study of Language (Audio Script Listening, Study of Foreign Language) If you click 'Like', you could get some more. https://www.facebook.com/tcaudio-1675376162680094

Screenshots

Pitch Shift (Key Change)2 screens
tc.audio2 screens

Verdict

The call

The clearest difference is in-app purchases: tc.audio at none against Pitch Shift (Key Change)'s 2. tc.audio also leads on review sentiment (77% vs 50%) and iOS requirement (9.3 vs 16.0). Pitch Shift (Key Change)'s advantage is ratings volume (85 vs 24). On price, rating, update cadence and ads 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. Pitch Shift (Key Change) sells 2 one-off in-app purchases. tc.audio 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 Pitch Shift (Key Change) against 4.3 for tc.audio. Both are backed by a comparable volume of ratings — 85 and 24 respectively. Written reviews are what separate them: 50% of Pitch Shift (Key Change)'s written reviews are positive against 77% of tc.audio's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
Pitch Shift (Key Change) versus tc.audio: the parameters behind the verdict, then further details
ParameterPitch Shift (Key Change)tc.audio
PriceFreeFree
Rating4.4 (85 ratings) — better4.3 (24 ratings)
Positive reviews50.0% of reviews76.7% of reviews — better
Number of ratings85 — better24
Update frequencyEvery 2 monthsEvery 2 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.09.3 — better
Further details — not scored
Size5 MB9 MB
Age rating4+4+
DeveloperLoop-Sessions.LLC.YOHAN KIM

Customer experience

Pitch Shift (Key Change)

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

tc.audio

All ratings23 ratings
Positive82.6%
Neutral4.3%
Negative13.0%
Written reviews73 reviews
Positive76.7%
Neutral6.8%
Negative16.4%

In-app purchases

2 purchases

Pitch Shift (Key Change)

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

tc.audio

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 tc.audio free?
tc.audio is free to download, with no in-app purchases.
Which has better reviews, Pitch Shift (Key Change) or tc.audio?
Pitch Shift (Key Change) is rated higher. Pitch Shift (Key Change) averages 4.4 out of 5 from 85 ratings, while tc.audio averages 4.3 from 24 ratings.
Do Pitch Shift (Key Change) or tc.audio have ads?
Both Pitch Shift (Key Change) and tc.audio show ads.
Which is updated more often, Pitch Shift (Key Change) or tc.audio?
Pitch Shift (Key Change) ships an update every 2 months, and tc.audio every 2 months. Most recently, Pitch Shift (Key Change) was updated on November 1, 2026 and tc.audio on November 2, 2026.

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