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Best Change Song Key Apps

249+ iOS apps curated and reviewed

3.8 avg rating
16 free apps
Updated September 2026

If you already know Music Transpose, this is the deeper bench. 249+ change song key apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.

Compare top Change Song Key Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Music Transpose - Key ChangerMusic Transpose - Key ChangerFree4.6★ (191)NoYesSep 2026
2Song Key FinderSong Key FinderFree2.9★ (108)YesYesJul 2026
3Auto-Key | Music key detectionAuto-Key | Music key detectionFree3.9★ (87)NoNoSep 2026
4TouchTunes: Jukebox MusicTouchTunes: Jukebox MusicFree4.9★ (1.1M)NoNoSep 2026
5Solo Karaoke Key MemoSolo Karaoke Key Memo$1.99—NoNoMay 2026
6Song Key FinderSong Key Finder$4.992.2★ (5)NoYesSep 2026
7OnlyGolfers AppOnlyGolfers AppFree4.8★ (29)NoYesSep 2026
8Sing Key Practice Notes2026Sing Key Practice Notes2026$0.29—NoNoSep 2026

Top Picks for Change Song Key

Music Transpose - Key Changer#1

Music Transpose - Key Changer by 同宝 金

Change the key of the song
Editor's Choice
🎵 Music
4.6(191 ratings)
FreeIn-App Purchases
Music Transpose - Key Changer screenshot 1
Music Transpose - Key Changer screenshot 2
Music Transpose - Key Changer screenshot 3
Music Transpose - Key Changer screenshot 4

Easily change the key and tempo of your music files. This app supports various audio and video formats, offering intuitive pitch and speed adjustments with visual feedback on sound quality. It's designed for musicians and learners seeking a user-friendly alternative to complex professional software.

Auto-Key | Music key detection#3

Auto-Key | Music key detection by Antares Audio Technologies, LLC

Music key and scale detection
Worth Considering
🎵 Music
3.9😐(87 ratings)
Free
Auto-Key | Music key detection screenshot 1
Auto-Key | Music key detection screenshot 2
Auto-Key | Music key detection screenshot 3
Auto-Key | Music key detection screenshot 4
Auto-Key | Music key detection screenshot 5
Auto-Key | Music key detection screenshot 6

Instantly identify the musical key and scale of any audio source, from studio tracks to live instruments and vocals. Seamlessly sync detected keys with your computer's Digital Audio Workstation (DAW) for enhanced music production.

What We Love

  • 👍 Accurate key detection (most of the time)
  • 👍 Useful for learning songs
  • 👍 Handy keyboard display for novice players
  • 👍 Free to use (initially)
  • 👍 Good for vocal production
  • 👍 Integrates with Auto-Tune
  • 👍 Simple and functional
  • 👍 Scales feature is a great addition
  • 👍 Works as advertised
  • 👍 "The Gold Standard. Fast & No Frills."
  • 👍 "Great app for making music !!!!"
  • 👍 "Super helpful product, great job"
  • 👍 "Excellent utility"
  • 👍 "Tut was es soll" (Works as it should)
  • 👍 "Parfait" (Perfect)
  • 👍 "Klappt immer" (Always works)
  • 👍 "Eine sehr gute App" (A very good app)
  • 👍 "Great App."
  • 👍 "Works as advertised."
  • 👍 "Solid, User Friendly Key Detection App"
  • 👍 "Amazing tool, much needed"

Room to Improve

  • 🐛 Inconsistent key detection
  • 🐛 Often gives wrong keys
  • 🐛 Slow performance
  • 🐛 Requires account creation after a few uses
  • 🐛 Privacy concerns with data sharing
  • 🐛 Account creation issues (buggy, can't access)
  • 🐛 Low volume for built-in keyboard
  • 🐛 Not recognizing modes other than major/minor
  • 🐛 App becomes unusable without account
  • 🐛 "Wrong Keys"
  • 🐛 "No good results"
  • 🐛 "Doesn’t work"
  • 🐛 "So many questions"
  • 🐛 "Was great, now not"
  • 🐛 "Didn’t work for me"
  • 🐛 "Waste of your time"
  • 🐛 "Seems pretty handy for picking harmonica keys"
  • 🐛 "What for?"
  • 🐛 "Sign in to use"
  • 🐛 "数回で" (Stopped working after a few times)
  • 🐛 "Privacy thief"
  • 🐛 "Truño" (Junk)
  • 🐛 "Stinks"
  • 🐛 "Em…"
  • 🐛 "Works great, until…"
  • 🐛 "This would be great if…"
  • 🐛 "Does not work"
  • 🐛 "Inconsistent key selection"
  • 🐛 "The volume"
  • 🐛 "Joke app"
  • 🐛 "Seems random"
  • 🐛 "I’m. It sure if it works because the piano scale volume is too low :/".
  • 🐛 "Nothing to do"
  • 🐛 "Requires login, does not support Sign in with Apple"
  • 🐛 "About Auto-key"
  • 🐛 "Not accurate at all unfortunately!"
  • 🐛 "Not always right"
  • 🐛 "Unusable"
  • 🐛 "Da vergeht ein der Spaß" (The fun disappears with your subscription)
  • 🐛 "The Redface" (Really good for key detection but…)
  • 🐛 "heyhoob" (The volume)

More Change Song Key apps to explore

FAQ about Change Song Key

What are the best change song key apps for iPhone?
Music Transpose - Key Changer tops our change song key apps ranking as of September 2026, with a 4.6-star average from 191 App Store ratings, and it's free to download.
Yes — 16 of the top change song key apps we rank are free to download, including Music Transpose - Key Changer and Song Key Finder.
Music Transpose - Key Changer has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ change song key apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
The Music Transpose app allows you to easily change the musical key and adjust the playback speed of songs. It supports a wide range of audio and video file formats, making it versatile for various music learning and practice needs. The app provides visual cues to help you understand the impact of pitch changes on sound quality.
Key features include support for common audio and video formats, pitch adjustment with color-coded feedback on sound quality, fine-tuning pitch in half-tone increments, and independent speed adjustment displayed with BPM. You can also export your modified files in multiple formats.