Best Song Key Apps

250+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated October 2026

Whether you're new to song key or looking for an upgrade, our curated collection of 250+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Song Key Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Auto-Key | Music key detectionAuto-Key | Music key detectionFree3.8โ˜… (96)NoNoNov 2026
2Song KeySong KeyFree5.0โ˜… (3)NoNoOct 2026
3SongKeyByEarSongKeyByEarFree5.0โ˜… (1)NoNoAug 2026
4TONALY: Songs, Scales & TheoryTONALY: Songs, Scales & TheoryFree4.8โ˜… (6.4K)NoYesNov 2026
5PitchShift: Song Key ChangerPitchShift: Song Key ChangerFreeโ€”NoYesOct 2026
6Song Key Finder 2Song Key Finder 2Freeโ€”YesYesOct 2026
7Song Key FinderSong Key FinderFree2.8โ˜… (106)YesYesOct 2026
8Chord ai - Play any song!Chord ai - Play any song!Free4.6โ˜… (5.9K)NoYesNov 2026

Top Picks for Song Key

3.8๐Ÿ˜(96 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

  • ๐Ÿ‘ Accurate key detection (most of the time)
  • ๐Ÿ‘ Useful for learning songs
  • ๐Ÿ‘ Handy keyboard display for novice players
  • ๐Ÿ‘ Free to use (initially)
  • ๐Ÿ‘ Good for vocal production
  • ๐Ÿ‘ Integrates with Auto-Tune
  • ๐Ÿ‘ Simple and functional
  • ๐Ÿ‘ Scales feature is a great addition
  • ๐Ÿ‘ Works as advertised
  • ๐Ÿ‘ "The Gold Standard. Fast & No Frills."
  • ๐Ÿ‘ "Great app for making music !!!!"
  • ๐Ÿ‘ "Super helpful product, great job"
  • ๐Ÿ‘ "Excellent utility"
  • ๐Ÿ‘ "Tut was es soll" (Works as it should)
  • ๐Ÿ‘ "Parfait" (Perfect)
  • ๐Ÿ‘ "Klappt immer" (Always works)
  • ๐Ÿ‘ "Eine sehr gute App" (A very good app)
  • ๐Ÿ‘ "Great App."
  • ๐Ÿ‘ "Works as advertised."
  • ๐Ÿ‘ "Solid, User Friendly Key Detection App"
  • ๐Ÿ‘ "Amazing tool, much needed"

Room to Improve

  • ๐Ÿ› Inconsistent key detection
  • ๐Ÿ› Often gives wrong keys
  • ๐Ÿ› Slow performance
  • ๐Ÿ› Requires account creation after a few uses
  • ๐Ÿ› Privacy concerns with data sharing
  • ๐Ÿ› Account creation issues (buggy, can't access)
  • ๐Ÿ› Low volume for built-in keyboard
  • ๐Ÿ› Not recognizing modes other than major/minor
  • ๐Ÿ› App becomes unusable without account
  • ๐Ÿ› "Wrong Keys"
  • ๐Ÿ› "No good results"
  • ๐Ÿ› "Doesnโ€™t work"
  • ๐Ÿ› "So many questions"
  • ๐Ÿ› "Was great, now not"
  • ๐Ÿ› "Didnโ€™t work for me"
  • ๐Ÿ› "Waste of your time"
  • ๐Ÿ› "Seems pretty handy for picking harmonica keys"
  • ๐Ÿ› "What for?"
  • ๐Ÿ› "Sign in to use"
  • ๐Ÿ› "ๆ•ฐๅ›žใง" (Stopped working after a few times)
  • ๐Ÿ› "Privacy thief"
  • ๐Ÿ› "Truรฑo" (Junk)
  • ๐Ÿ› "Stinks"
  • ๐Ÿ› "Emโ€ฆ"
  • ๐Ÿ› "Works great, untilโ€ฆ"
  • ๐Ÿ› "This would be great ifโ€ฆ"
  • ๐Ÿ› "Does not work"
  • ๐Ÿ› "Inconsistent key selection"
  • ๐Ÿ› "The volume"
  • ๐Ÿ› "Joke app"
  • ๐Ÿ› "Seems random"
  • ๐Ÿ› "Iโ€™m. It sure if it works because the piano scale volume is too low :/".
  • ๐Ÿ› "Nothing to do"
  • ๐Ÿ› "Requires login, does not support Sign in with Apple"
  • ๐Ÿ› "About Auto-key"
  • ๐Ÿ› "Not accurate at all unfortunately!"
  • ๐Ÿ› "Not always right"
  • ๐Ÿ› "Unusable"
  • ๐Ÿ› "Da vergeht ein der SpaรŸ" (The fun disappears with your subscription)
  • ๐Ÿ› "The Redface" (Really good for key detection butโ€ฆ)
  • ๐Ÿ› "heyhoob" (The volume)
Song Key#2

Song Key by Gene Halbrooks

What key is the song in?
Strong Contender
๐ŸŽต Music
5.0(3 ratings)
Free
Song Key screenshot 1
Song Key screenshot 2
Song Key screenshot 3

Instantly identify the key of any song and discover the recommended harmonica for playing it. Get helpful tips and explore different playing positions, perfect for harmonica players of all levels.

SongKeyByEar#3

SongKeyByEar by Andrii Rudenko

Melody exploration, simplified
Worth Considering
๐ŸŽฌ Entertainment
5.0(1 ratings)
Free
SongKeyByEar screenshot 1
SongKeyByEar screenshot 2

Enhance your aural skills and music theory knowledge with an interactive tool. Explore scales, chords, and melodies using the Circle of Fifths and an on-screen piano. Identify song keys by matching scales and chords to melodies.

More Song Key apps to explore

FAQ about Song Key

What are the best song key apps for iPhone?
Auto-Key | Music key detection tops our song key apps ranking as of October 2026, with a 3.8-star average from 96 App Store ratings, and it's free to download.
Yes โ€” 18 of the top song key apps we rank are free to download, including Auto-Key | Music key detection and Song Key.
Auto-Key | Music key detection has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 250+ song key apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

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