Tenney - a ratio first tuner and lattice for just intonation Tenney is a musician’s tuner built around intervals instead of only note names. It shows live pitch as simple fractions (like 3/2) so you can hear and see how every note relates to a chosen root in just intonation. SEE INTERVALS INTUITIVELY * Live pitch readout with ratio, plus or minus cents vs 12 TET, and Hertz * Confidence meter to judge how stable the pitch is * Adjustable root (for example 415 or 440 Hz) and prime limit * High precision pitch tracking designed for real world performance EXPLORE A LIVE LATTICE * Interactive 3 by 5 plane with pinch to zoom and smooth panning * Tap any node to see its fraction p slash q, cents vs 12 TET, and Hz at a glance * Prime overlay chips (7, 11, 13 and beyond) to reveal higher prime families * Axis Shift ribbon (plus or minus 3, 5, 7, 11) to slide the lattice along musical directions * Selection tray to collect and compare intervals while you explore MADE FOR JUST INTONATION MUSICIANS * Ratio centric labels with proper oddization * Prime limit control (3, 5, 7, 11, 13 plus) to match your harmonic language * Detection strictness options (Loose, Performance, Strict) for different situations * Designed to feel immediate, informative, and stage safe THOUGHTFUL BY DEFAULT * Works offline, no accounts, no ads, no tracking * Light and Dark appearance, portrait and landscape * Fast, fluid interface built for modern Apple devices WHAT IS IN THIS VERSION * Core tuner with ratio labels, cents vs 12 TET, and confidence * Lattice version 0 point 3: explore intervals, toggle prime overlays, shift axes, build selections * Practice timer and root following test tone for focused sessions WHO TENNEY IS FOR * Performers and composers working in just intonation * Ear training, rehearsal, and structural exploration of just intonation spaces * Anyone curious about harmonic relationships beyond 12 TET SUPPORT Questions or feedback We would love to hear how you are using Tenney in your practice and performance.