Guitar Shark

Free Online Guitar Tuner

Tune in seconds.
No download needed.

Pluck any string. Your browser hears it and tells you exactly how to tune — sharp, flat, or dead on.

Mic idle
Confidence --
Auto target
In tune
Auto target
--
Press Start Tuning and pluck one clean open string
Measured pitch will appear here
-50 -25 0 +25 +50
Measured pitch
--.- Hz
Waiting for signal
Input level
Quiet
Pluck once, then let it ring
Reference pitch
A4 440 Hz
Calibrate from 432 to 446 Hz
Tuning
Audio stays in your browser and is never recorded or uploaded
Get Guitar Shark Free on iOS

Tuner + chords + metronome + ear training · No account required

Live Metronome

Speed trainer you can use right now.

Set a start BPM, target BPM, phrase length, and BPM increase per phrase. The trainer handles the ramp so you can stay on the part instead of watching a clock.

Live speed trainer
Ready
90
BPM
Set your phrase and press Start.
Target 120 BPM / 4 bars per phrase / +4 BPM each phrase
Phrase
1
Bar 1 of 4
Current
90
Live BPM
Next phrase
94
Step +4 BPM
30300
30300
020
116
Browser audio only. Accented downbeat, live phrase ramp, no plugins.
166
Chords in library
15
Scales with CAGED
9
Time signatures
2
Tracking modes
$0
To get started
Chord Library
Metronome
Guitar Shark Home
Ear Training
Courses

Free Forever

Everything you need.
Nothing you don't.

Six essential tools. No account, no ads, no limits. Open the app and play.

🎵

Chromatic Tuner

Real-time pitch detection with visual pitch bar. Configurable reference pitch from 415 Hz Baroque to 444 Hz, plus custom presets.

± 1 cent accuracy
🎸

Chord Library

166 chords with interactive fretboard diagrams. Every root note, every quality — major, minor, 7th, maj7, sus, dim, aug, and more.

166 chords
🥁

Metronome

30–300 BPM with tap tempo. Nine time signatures from 2/4 to 11/8. Speed trainer auto-increases tempo as you practice.

9 time signatures
🎶

Chord Progressions

Common progressions in every key with audio playback. Hear how chords flow together and practice along in real time.

All 12 keys
🎼

Scale Explorer

15 scales across all keys with interactive CAGED position boxes. See every pattern on the fretboard — pentatonic, blues, modes, and more.

15 scales · CAGED
🔥

Practice Streaks

Daily challenges and streak tracking keep you coming back. Build consistency without thinking about it.

Daily challenges
Tuner Reference Pitch

Tuner

Concert pitch.
Or yours.

Six built-in presets from 415 Hz Baroque to 444 Hz Bright, plus custom presets you create. See cents offset at a glance. All audio processing happens on-device — never recorded or transmitted.

415 Baroque 432 Verdi 440 Concert Custom presets
Speed Trainer

Metronome

Speed trainer
built in.

Set a starting BPM and a target. Guitar Shark auto-increases your tempo by a configurable amount every N measures — so you build speed without thinking about it. Nine time signatures cover everything from waltz to odd-meter prog.

Auto tempo increase Compound meters Tap tempo
Ear Training

Ear Training

Learn to hear
everything.

Structured lesson trees take you from identifying natural notes to recognizing intervals and chord qualities. Each lesson unlocks the next — building real musicianship progressively, not randomly.

Note identification Intervals Chord qualities Learn + Practice modes

Structured Learning

Courses that
actually teach.

Not just reference material. Real lessons with progress tracking, quizzes, and sequential unlocking.

🎯

Ear Training

Notes, intervals, and chords — from natural notes to full quality recognition

⭕

Circle of Fifths

8 lessons on key relationships, relative minors, and practical application

🔢

Nashville Numbers

The universal chord language — read charts, transpose on the fly, slash chords

↕️

Intervals

6 lessons on hearing and understanding the distance between notes

🧱

Chord Construction

6 lessons on how chords are built from scales — triads, 7ths, extensions

🎛️

Modes

7 lessons covering Ionian through Locrian — sound, feel, and application

Nashville Number System

Courses

Real progress.
Not random tips.

Each course tracks completion, unlocks lessons sequentially, and shows your progress at a glance. You'll know exactly where you are and what's next — like a textbook that tracks itself.

Progress tracking Sequential lessons Visual reference charts

Pricing

Free is generous.
Pro is everything.

Most guitar apps charge for what we give away. Shark Mode unlocks the full experience.

Free

$0 — forever

  • Chromatic Tuner with custom presets
  • 166-chord library with voicings
  • Metronome with speed trainer
  • Chord progressions in all keys
  • Ear Training — Note ID lessons
  • Practice streaks & daily challenges
  • No ads, no account required

Shark Mode

$9.99/mo or $59.99/yr Save 50%

  • Everything in Free
  • Full Ear Training — Intervals & Chords
  • All 6 structured courses
  • Scale patterns & lick library
  • Jam tracks & backing tracks
  • 7-day free trial on annual

Why Guitar Shark

What other apps
charge for, we don't.

Built by guitarists who got tired of paying $20/month for a tuner and some chord diagrams.

🆓

Free tools, no tricks

Most guitar apps lock the tuner behind a paywall or blast you with ads. Our core tools are free forever. No account, no ads, no limits.

🎸

Real audio engine

Not sampled recordings. Guitar Shark uses physical string modeling to synthesize guitar tones in real time. Hear chords, scales, and patterns played back with actual string physics.

🗺️

CAGED system built in

The scale explorer shows every position across the neck using the CAGED framework. Most apps ignore fretboard visualization entirely.

🔒

Privacy first

Microphone audio is processed on-device and never leaves your phone. No analytics, no tracking, no cloud. Your practice is your business.

FAQ

Questions? Answers.

Can I tune my guitar online without downloading an app?
Yes — the free online guitar tuner at the top of this page works directly in your browser. No download, no account, no install. Click "Start Tuning," allow microphone access, and pluck a string. It detects pitch in real time and shows you exactly how sharp or flat each string is. Works on any acoustic or electric guitar on desktop or mobile.
Is Guitar Shark really free?
Yes. Core tools — tuner, 166 chords, metronome, chord progressions, scale explorer, practice streaks, and ear training note ID — are free forever. No account needed, no ads. Shark Mode ($9.99/mo or $59.99/yr) unlocks advanced ear training, all courses, scale patterns, and jam tracks.
What do I need to get started?
An iPhone and a guitar — acoustic or electric, doesn't matter. The app uses your phone's microphone for the tuner. No cables, adapters, or extra gear required.
Does it work with electric guitar?
Yes. Guitar Shark works with any acoustic or electric guitar. The tuner picks up sound through your phone's microphone, so just play near your phone.
How is Guitar Shark different from Yousician or Fender Play?
Guitar Shark gives you professional-grade tools for free — a chromatic tuner, 166-chord library, metronome, scale explorer, and ear training. Other apps charge $20/month for less. We focus on tools and music theory rather than play-along lessons, making us the better choice for guitarists who want to understand their instrument.
What's included in Shark Mode?
Full ear training (intervals and chord qualities), all 6 structured courses (Circle of Fifths, Nashville Numbers, Intervals, Chord Construction, Modes), scale patterns and lick library, plus jam tracks.
Is my data private?
Yes. Audio from the tuner and ear training is processed entirely on your device and is never recorded or sent anywhere. We don't have accounts, analytics, or tracking.

Ready to shred?

Free on the App Store. No account required. No ads ever.

Download for iOS — It's Free