FretFlux: Guitar & Bass Tuner

FretFlux is a studio-grade Dark Neon chromatic and instrument tuner crafted for guitarists, bass players, ukulele players, and guitar techs. Powered by a native McLeod Pitch Method (NSDF) DSP engine with parabolic sub-sample interpolation, FretFlux locks onto your pitch instantly—from the low B0 (30.87 Hz) of a 5-string bass up to the highest frets—while rejecting room noise and overtone confusion. INCLUDES STANDALONE APPLE WATCH APP Tune right from your wrist even without your iPhone nearby! The companion Apple Watch app uses the watch's built-in microphone, lets you lock strings hands-free with the Digital Crown, plays reference tones from your wrist, and gives you a crisp Taptic pulse the moment your string locks in tune. KEY FEATURES • 6 Instruments Supported: 6-String & 7-String Guitar, 4-, 5- & 6-String Bass, and Ukulele. • 15 Built-in Presets + Custom Tunings: Standard, Drop D, Drop C, Drop A, Half-Step Down (Eb), D Standard, Open G, Open D, DADGAD, Ukulele Low G, Baritone, plus a string-by-string custom tuning editor. • Auto Detection & Manual String Lock: let FretFlux detect your string automatically or lock onto a single string in loud rehearsal rooms. • Warm Harmonic Reference Tone Generator: train your ear by playing the exact reference pitch for any string. PRO ANALYSIS & CALIBRATION TOOLS • 0.1-Cent Precision Mode & Live Oscilloscope: built for guitar setup and 12th-fret bridge intonation. • Real-Time FFT Spectrum & Harmonics Analyzer (1f0–6f0): inspect your instrument's fundamental and overtone balance. • A4 Reference Calibration: adjustable in 0.1 Hz steps from 415.0 Hz to 466.0 Hz (including 432 Hz, 440 Hz, and 442 Hz). • 3 Mic Sensitivity Modes (Low, Normal, High) and high-contrast OLED Stage Mode for live gigs.