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.
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.
- Real-time pitch shifting
- 31-band equalizer
- AUv3 effects support
- A-B loop playback
- Center Cancel/Emphasis
- Audio file export
- Background playback
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[ 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. ================================================
tc.audio
Adjust playback speed, pitch, and loop sections of audio files. Ideal for learning music or languages by allowing focused listening and repetition.
- Playback speed control
- Repeat and loop playback
- Pitch alteration (semitone transposition)
- Seek and playback navigation
- Shuffle play
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: : 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
Verdict
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
Both are free to download. Pitch Shift (Key Change) sells 2 one-off in-app purchases. tc.audio asks for nothing beyond the download.
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.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Pitch Shift (Key Change) | tc.audio |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (85 ratings) — better | 4.3 (24 ratings) |
| Positive reviews | 50.0% of reviews | 76.7% of reviews — better |
| Number of ratings | 85 — better | 24 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 5 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Loop-Sessions.LLC. | YOHAN KIM |
Customer experience
Pitch Shift (Key Change)
tc.audio
In-app purchases
Pitch Shift (Key Change)
- 31 bands equalizer$0.99
- Always remove banner ads.$2.99
tc.audio
No in-app purchases
Questions
Is Pitch Shift (Key Change) free?
Is tc.audio free?
Which has better reviews, Pitch Shift (Key Change) or tc.audio?
Do Pitch Shift (Key Change) or tc.audio have ads?
Which is updated more often, Pitch Shift (Key Change) or tc.audio?
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