432 Hz Guitar Tuner

Tune with precision. Choose your frequency.

432 Hz Tuner is a professional-grade chromatic tuner for guitarists and musicians who want accurate tuning with support for alternative tuning standards - now with a built-in metronome and capo support.

Tune your instrument to 432 Hz, 440 Hz, or 430.54 Hz scientific pitch, with real-time visual feedback and cent-level precision. Whether you're exploring alternative tunings or just need a reliable everyday tuner, this app delivers accuracy, clarity, and simplicity.

Core Features

- Chromatic tuner for guitar, bass, ukulele, and any instrument
- Three tuning standards: 440 Hz – modern industry standard, 432 Hz (Verdi tuning) – popular alternative tuning, 430.54 Hz scientific pitch - mathematically derived system with middle C at 256 Hz
- Guitar-first design with automatic string detection (E A D G B E)
- Capo support - select your capo fret and string names update instantly
- Built-in metronome with adjustable BPM (40–240), tap tempo, and customisable beats per bar
- High-precision pitch detection (±1 cent accuracy)
- Fast, low-latency response for real-time tuning
- Works completely offline
- Dark mode support

Designed for Musicians

The tuner works chromatically by design, meaning it can detect and tune any note you play. Instrument presets for guitar, bass, and ukulele provide a clearer, more intuitive interface - making tuning faster and easier without sacrificing flexibility. The metronome runs independently so you can keep time without leaving the app.

Learn About Tuning Standards

Includes a built-in Learn section that explains:
- What 432 Hz tuning is and why musicians use it
- The history of Verdi tuning
- What 430.54 Hz scientific pitch means and how it differs
- How modern 440 Hz became the standard
- How to use the tuner effectively

Who This App Is For

- Guitarists exploring 432 Hz or alternative tunings
- Musicians who want a reliable chromatic tuner with a built-in metronome
- Players who use a capo and need accurate transposed string detection
- Anyone who wants a clean, accurate, free tuner with no distractions

Free & Simple

No accounts
No internet required
No unnecessary permissions
Free to use

Download 432 Hz Tuner and tune your instrument your way - accurately, clearly, and confidently.