Tune Up. Turn Up.
Instant chromatic tuning for guitar, baritone and bass. Dead Accurate!
It listens through the microphone, reads your pitch in real time, and the audio never leaves the phone. Nothing is recorded, nothing is stored.
Iron Ear · For iPhone and iPad
Guitar Ear Trainer
Ear training and fretboard theory for guitar, baritone and bass. Ninety-nine cents, once. No ads, no subscription, no account, no tracking, and no network connection, ever.
Coming soon to Android
Out now for iPhone and iPad. The whole app runs on your phone.
- Price
- $0.99 once
- Requires
- iOS 17 or later
- Accounts
- None
- Network use
- Zero
What’s inside
Pay Once. Riff Forever.
Six essential guitar tools. No subscriptions, no ads, no account — just you, your instrument and louder ideas.
- Ear Training
- Fretboard
- Chords
- Circle of Fifths
- Tuner
- Metronome
Own the Fretboard
Every note. Every key. Every position.
The full neck for guitar, baritone and bass: note map, scale positions, shape boxes and three-notes-per-string patterns. Practice drills run at your tempo, in either direction, on a loop.
Every dot is tappable, and every tap sounds a real plucked string.
Hear Like a Riff Lord
Train your ears. Trust your instincts.
- Notes: hear a pitch, name it.
- Intervals: hear two notes, name the distance.
- Chords: hear a chord, name its quality.
Each runs easy, medium or hard. Chords adds an expert tier and any question can be replayed as many times as you need. Streaks and stats build up as you go, and they stay on the device.
Summon Massive Chords
29 chord types. Every key. Every voicing.
A searchable chord library with playable diagrams, plus quick-pick shapes for the ones you reach for constantly.
Build mode works the other way round: put your fingers on the fretboard and Iron Ear tells you what you just played.
Learn the Rules. Break Them.
The Circle of Fifths, Nashville Numbers and progressions you’ll actually use.
An interactive wheel for keys, relative minors and key signature, the map that makes the rest of it click.
Tap a progression: I–IV–V and other Nashville-number rows and hear it played back in whichever key you land on.
Keep Time. Stay Tight.
30 to 300 BPM, in your ears and in your hand.
- Time: eight signatures, from 1/4 to 12/8.
- Clicks: quarter, eighth, triplet or sixteenth.
- Sounds: eleven clicks, plus Silent.
- Tap tempo: tap the big number in time.
A haptic beat you can feel in your hand. Start it and go work in any other tab. It keeps clicking, even under the lock screen.
New in 1.3
Fresh Off the Bench
Two new tricks on the Circle of Fifths, and a metronome that comes with you.
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Your Progression. Tap in your chords, Iron Ear names the key and marks the borrowed ones.
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Spin. Spin the wheel to land on a key.
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Always on. The click keeps going while you work in the other tabs.
Privacy
Everything you do stays on this device
This isn’t a promise not to sell your data. There is nothing to sell: Iron Ear has no networking code in it at all. It never opens a connection, so nothing can leave your phone even by accident.
- No account, no sign-in, no email address to hand over.
- No analytics, no tracking, no advertising, no third-party SDKs.
- Scores, streaks and settings are written to your device and stay there.
- Delete the app and that data goes with it. There is no copy anywhere else.
- Every screen works in airplane mode, because that is the only mode it has.
App Store privacy label
Data Not CollectedThe developer does not collect any data from this app. That is the whole label — there are no other rows to expand.
Built for players who practise
Iron Ear is made by one small studio, sold once for a dollar, and shipped without a single thing designed to keep tabs on you. If something is broken or missing, write to us — a person reads it.