iontuner

Your most stable, most accurate tune yet. Steady readings: notes hold instead of flickering and the needle stops bouncing — even on high strings and classical guitar. Hears more: far better pickup for quiet, acoustic, and un-amplified instruments, especially bass. Sensitivity slider: dial in extra reach for quiet rooms or reject noise in loud ones, with a clear on-screen readout of the level you're using. Smarter detection: fewer octave mix-ups, so your high E stays your high E. Tuned per instrument: improved accuracy for guitar, bass, ukulele, violin, and 12-string. New strobe display for sub-cent precision. Guided tuning: each string lights up and gets checked off as you tune. Thanks for tuning with us — we read every piece of feedback.

v2.4.9 — Major update. DOUBLE BASS Full support for the lowest orchestral string instrument. Standard 4-string, Solo Tuning, 5-string, C Extension, and the historical Viennese tuning. Detection down to B0 (30.9 Hz) with optimizations for both arco (bowed) and pizzicato (plucked) playing. 10 WORLD INSTRUMENTS Oud (with four regional tunings: Arabic, Iraqi, Turkish, Egyptian), saz/bağlama (Turkey), charango (Andes), cuatro venezolano and puertorriqueño, tres cubano, bouzouki (Greek and Irish), balalaika (4 sizes), erhu, and pipa. Hidden behind a "Show world instruments" toggle so the picker stays clean. FIVE CONCERT A PITCHES Added 415 Hz (Baroque), 430 Hz (Classical), and 442 Hz (Orchestral) to the existing 432/440 options. For period instrument musicians and modern orchestras. BETTER DETECTION Significantly improved handling of low fundamentals (bass guitar, cello, double bass), bowed instruments (smoother needle on arco notes), and high-fret guitar notes (longer sustain detection). SIMPLER DETECTION MODES Four modes reduced to two — Standard and Pro. Standard handles everything reliably; Pro is for situations where sub-cent precision matters (piano tuning, double bass low octave, reference work). Plus dozens of small refinements: better harmonic correction, startup transient handling, instrument-specific filters, and per-instrument confidence thresholds. Still free. Still no ads. Still no subscriptions. Forever.