TuneLog: Tuner & Metronome

TuneLog is a chromatic tuner and metronome built to be reliable. Play a note and the needle settles right away; come back from a call and it is still listening. Use it as a guitar tuner, bass tuner, ukulele tuner, violin tuner or cello tuner, or in chromatic mode for any instrument.

A TUNER YOU CAN TRUST
• Accurate to about one cent, from a 5-string bass's low B (31 Hz) up to the top of a piano
• A calm needle with a green in-tune zone, the note and octave, cents and Hz
• Picks out the string you are tuning and ticks it off when it is in tune
• The microphone restarts by itself after calls, alarms, voice assistants or headphones, so it never goes dead

INSTRUMENTS AND TUNINGS
Chromatic for any instrument, plus guitar (standard, drop D, half step down, D standard, DADGAD, open G, D and E), bass 4 and 5 strings, ukulele, baritone ukulele, violin, viola, cello, double bass, mandolin and banjo. Tap a string to hear a reference tone.

FOR EVERY ENSEMBLE
• Calibration from A4 = 415 to 466 Hz (440, 442, 443 one tap away)
• Note names as C D E, Do Re Mi or German C D E … H
• Written notes for B-flat, E-flat and F instruments

A METRONOME THAT KEEPS TIME
• 20 to 300 BPM, tap tempo, hold + or − to change fast
• Clicks are rendered as one sample-accurate bar, so the beat never drifts, even when the screen is busy
• Time signatures from 1/4 to 12/8, eighths, triplets and sixteenths, accents per beat, four sounds
• Save the tempo and meter of each piece you practise

FREE AND PRO
Free, with no ads: the chromatic tuner, guitar in standard tuning, calibration and the 4/4 metronome. TuneLog Pro, a single in-app purchase: every instrument and tuning, reference tones, transposing instruments, every time signature, subdivisions, accents, sounds and saved songs.

PRIVACY
No account, no ads, no analytics, no internet connection. The microphone is used only while the tuner is on screen; the sound is analysed on your phone and never recorded, saved or sent.

LANGUAGES
English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Turkish, Japanese, Korean, Chinese.

Questions or requests: the support link in Settings reaches a human, usually the same day.

Recent changes:
First release: a chromatic tuner that keeps listening and catches low bass notes, 20 tunings for 9 instruments, and a metronome that never drifts. No ads, no account.