A little clarity before you play

In tune.
At any angle.

Meet isotropitch. A calm, clear tuner for guitar, bass and ukulele, designed to move with your iPhone Duo.

Built for iPhone.
Optimised for iPhone Duo.

ADAPTIVE BY DESIGN 01 / 04

Guitar, bass & ukuleleAutomatic layoutsAudio stays on your iPhoneNo account needed

01 / Made for iPhone Duo

Your iPhone moves.
Your tuner follows.

On your lap, on a music stand, or beside you. Isotropitch finds a comfortable layout as you fold, open and rotate your iPhone Duo.

Four views. One tuning session.

Closed iPhone Duo in landscape: a wide outer display with the note on the left and string controls on the right.

Turn it. Keep your place.

The outer display places your reading and string controls side by side. Rotate your Duo and keep the same tuning session going.

Duo fold features require iOS 27.1 or later. Device and display proportions follow iPhone Duo specifications. App layouts illustrated with sample readings.

Closed, landscape: Reading and controls side by side on the outer display.

Closed, portrait: A large note above the string controls on the outer display.

Fully open, landscape: Reading and controls share the expanded inner display.

Vertical fold, portrait: The portrait inner display keeps the reading and controls clear of the active fold.

Clarity, in light or dark.

Isotropitch in its midnight-blue dark appearance, showing a held A2 string and guitar controls

Isotropitch in its pearl light appearance, with a large A2 note, pitch scale and instrument controls

02 / Less between you and the music

One string.
One clear answer.

Pluck a string. See the note. Follow the gentle direction to tune up or down. A steady reading brings a quiet confirmation.

A reading you can read.

A generous note, a fine pitch scale, and a larger standing view keep the essentials in sight.

Follow a string. Or hold it.

Automatic string detection follows your playing. Tap a string to keep that target in place.

Your sound stays yours.

Audio is processed on your iPhone. Never saved. Never uploaded. No account to create.

03 / Find your familiar

Three instruments.
Room to explore.

E₂A₂D₃G₃B₃E₄

Standard tuning, and a few new directions.

Standard · Drop D · Half step down · DADGAD · Open G

Make it your reference. A4 calibration from 430 to 450 Hz.

Coming soon to iPhone

A quiet moment.
Then, the music.

Isotropitch is getting ready for its first release.
Come back here for the App Store link when it’s available.

iOS 18 or later · iPhone Duo fold features on iOS 27.1 or later

In tune.At any angle.

Your iPhone moves.Your tuner follows.