Key Changer is made and published by Joseph Ratterman. AppBrain is an independent app data site and isn't affiliated with Joseph Ratterman. The app name, icon, screenshots and description belong to Joseph Ratterman and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- August 26, 2026
Rankings
App Store top chartsApp Store Rankings for Key Changer
Competitors
Similar apps and more from Joseph RattermanAlternatives to Key Changer
More from Joseph Ratterman
Releases
Updates seen on the App Store- Version
- 1.0
- Launched
- August 2026
No changelog data
User feedback
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 6.07 MB
- Content rating
- Everyone
Technologies used by Key Changer
About the app and developer
About Key Changer
Key Changer is a music app developed by Joseph Ratterman.
User Ratings
The app has no ratings yet.
App Information
Key Changer is freely available from the App Store. The app size is 6.07 MB. The latest version available is 1.0. The last update was on August 26, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since August 2026.
Developer information for Joseph Ratterman
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Frequently asked questions about Key Changer
Is Key Changer free?
Yes. Key Changer is free on the App Store.
Is Key Changer still available?
Yes. Key Changer is on the App Store, and the last update we saw was on August 26, 2026.
How large is Key Changer?
Key Changer is 6.07 MB.
Is Key Changer suitable for children?
App Store rates the content of Key Changer as suitable for everyone.
Who made Key Changer?
Key Changer was developed by Joseph Ratterman. It is listed in the music category on the App Store.
What are the best alternatives to Key Changer?
People looking at Key Changer also look at these music apps: KeyTempo, PitchPro: Backing Track Key, JHG Looper, PracticePal AI: Music Practice, Audio/Video Looper - RepeatLab.
Store listing
By Joseph Ratterman, from the App Store
Description by Joseph Ratterman Written by the developer, not by AppBrain. Click to read.
AUDIO FILE TRANSPOSITION
• Import an audio recording and detect its musical key
• Choose a new key and transpose the recording
• Preview the transposed result before exporting
• Share your new version in M4A or WAV format
LIVE AUDIO DETECTION
• Use your iPhone microphone to listen to music playing nearby
• Capture a 12-second sample to estimate a song's key and tempo
• Helpful for rehearsals, live performances, and learning songs by ear
CHORD SCANNER
• Choose a current key and target key for a chord chart
• Point your camera at a chord sheet to see transposed chord labels as you scan
• Capture a snapshot, or import a PDF or image of a chord chart
• Review and share a transposed chart for practice, rehearsal, or performance
Key Changer is made for vocalists finding a comfortable range, worship leaders preparing charts for their teams, bands adapting songs for live performance, music students, and anyone learning by ear.
All audio analysis and chord recognition happen on your device. No account or subscription is required. Clear audio and easy-to-read chord charts provide the best results; automatic key and tempo results are helpful estimates, so trust your ears too.