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Lodestone online guitar tuner

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The Lodestone app icon: a white ring on violet, its last few particles drifting into place.

Beautiful guitar tuner

A compass for your strings

The lodestone is the naturally magnetized rock early navigators used as a compass: the thing that finds north. This one finds your note. The icon is the moment it does, when the ring of particles settles and the last few drift into place.

No menus. No setup.

The whole screen is the instrument.

Open Lodestone and it's already listening. Play a string and the screen floods with that note's color, a big letter tells you where you are, and a field of particles tightens from a loose cloud into a solid ring as you lock in. You're looking at that same engine right above; it's Lodestone running in your browser.

Every string and the note it should be

Forgot what a string should be? Pick your instrument and the strings appear with their notes underneath. Tap one to hear it, or turn on the mic and the string you're tuning lights up, glowing brighter as you get close.

Lodestone for iPhone shows these strings too, with the one you're tuning lit up. 99¢, once.

🌈

Color is the reading

Every note has its own hue: low pitches glow red, high pitches violet. One trip around the rainbow per octave.

🎯

Tuned to a hair

A hand-rolled YIN pitch engine, validated to 0.05 cents. Rock-steady even on a low E, where cheap tuners get jittery.

✨

You feel the lock

The particles settle, the orb fills, the edges glow, and you get a soft tap the instant you're in tune.

🎸

Anything with strings

It opens as a chromatic tuner, so it hears anything. Pick guitar, bass, ukulele or violin to see the strings, with Drop D, DADGAD, open G and more built in.

🔒

Nothing leaves the device

Audio is processed live to find the note and is never recorded, stored, or sent anywhere.

🍃

Made with care

Zero ads, zero accounts, zero tracking. A small, independent app built because the free tuners deserved better.

Why I made this

I came to music late. For most of my life I figured it just wasn't for me. Being "a music person" felt like something you either were or weren't, and I wasn't.

Then a couple of years ago, something flipped. I decided I'd become someone who plays. I started with violin, stuck with it for a year, and got to a place I was proud of. Then a stretch of piano. Now I'm almost two years into guitar, and I play every day.

Here's what I found: anybody can play music. You just need a little space, some good coaching, and a bit of perseverance. That's really it. Music has become one of my favorite things, and I think more people should get to feel it.

So I made the tuner I always wanted, the one I actually love picking up every day. I hope you love it too. 🙏

peace,
Paul

Questions

How much does Lodestone cost?

The iPhone and iPad app is 99¢, once. There are no ads, no subscription and no account. The tuner on this page is free to use in your browser.

What instruments does it work with?

Anything with strings. Guitar, bass, ukulele and violin have string views and tunings built in. Banjo, mandolin, cello and everything else work in chromatic mode.

What is a chromatic tuner?

A chromatic tuner shows the nearest of all twelve notes, so it works with any instrument and any tuning. Lodestone opens that way; pick an instrument when you want to see its strings.

How accurate is it?

Lodestone's pitch detection was validated to within 0.05 cents on test tones across every guitar, bass and ukulele string.

Does it record my audio?

No. The mic is used only to find the note, live on your device or in your browser. Nothing is recorded, stored, or sent anywhere.

Now on the App Store

Lodestone is live for iPhone and iPad. 99¢, once. No ads, no accounts, no subscription. Download it and play.

Download on the App Store