EST. 2026

CAT. NO. 12 / GUITAR & BASS TUNER APP

A tuner built
like a piece
of gear.

PLATE 01 — THE INSTRUMENT

GUITAR · STANDARD

E

IN TUNE

82.41 Hz

  1. E
  2. A
  3. D
  4. G
  5. B
  6. E

A

The disc is the readout.
Colour is the state.

B

Frequency, always tabular.

C

Note name in the display face.

D

Six strings. Tap to lock one.

One screen. Nothing to configure, nothing to dismiss, nothing to sign into.

THE WHOLE FLOW

Left to right,
that is the whole app.

  1. GUITAR · STANDARD

    —

    LISTENING

    —

    1. E
    2. A
    3. D
    4. G
    5. B
    6. E

    01

    Listening

    Before you play a note

  2. GUITAR · STANDARD

    E

    FLAT

    78.9 Hz

    1. E
    2. A
    3. D
    4. G
    5. B
    6. E

    02

    Flat

    Play a string, turn the peg

  3. GUITAR · STANDARD

    E

    ALMOST

    82.1 Hz

    1. E
    2. A
    3. D
    4. G
    5. B
    6. E

    03

    Almost

    Nearly there, slow down

  4. GUITAR · STANDARD

    E

    IN TUNE

    82.41 Hz

    1. E
    2. A
    3. D
    4. G
    5. B
    6. E

    04

    In tune

    Green. Move to the next string.

NO ONBOARDING FLOW · NO ACCOUNT SETUP · NO PAYWALL

PLATE 02 — OMISSIONS

The best part
is what is missing.

  1. No ads

    Nothing between you and the needle

  2. No account

    Open it and tune

  3. No subscription

    There is no tier to upsell

  4. No data collection

    Nothing leaves your phone

  5. Works offline

    A basement is the point

WHY TWELFTH FRET

The one place pitch
stops being a sound.

Touch a string above the twelfth fret and the octave harmonic appears. The string splits in two, and a node sits still, exactly there.

PLATE 04 — SPECIFICATION

Accurate to half a cent.

RANGE
A0 – C8
Every note on a standard neck, and then some
ACCURACY
± 0.5 cent
Finer than the ear can resolve
LATENCY
< 40 ms
Faster than the note decays
INSTRUMENTS
Guitar, bass
Any tuning, chromatic by default
CONNECTION
None
Works with the phone in flight mode

PLATE 05 — THE MAKER

Made by one person who got tired of
closing a banner ad before rehearsal.

It will stay free because it costs almost nothing to run, and because charging for a tuner feels wrong.