REF vs Tuner · Baro

REF-440: The tuner that disappears when you need to play. REF-440 is designed for musicians who demand precision and clarity. Inspired by Dieter Rams and Teenage Engineering, every pixel serves a purpose. No ads. No clutter. Just a precision instrument that helps you tune and get back to making music. Precision You Can Feel REF-440 uses the McLeod Pitch Method (MPM) algorithm, optimized for real-time guitar tuning. With ±2¢ accuracy, adaptive smoothing, and intelligent note locking, you get stable readings that don't jump around — even in noisy environments. Designed Like an Instrument The interface mimics a hardware tuner: a dark "faceplate" display panel, needle meter with ghost trails, and LED indicator. The 135-point note display is readable from across the room. Orange means action, neutral means success. Context-Aware Instructions Forget "flat" and "sharp." REF-440 tells you what to do: TIGHTEN or LOOSEN for strings, TUNE UP or TUNE DOWN for chromatic mode. Physical actions for physical instruments. Every Guitar Player's Needs Guitar — 12 tuning presets including Standard, Drop D/C/B, Open G/D, DADGAD, and more Bass — Standard, Drop D, Half-Step Down, 5-String Ukulele — Standard (High-G), Low-G, Baritone Chromatic — Detect any pitch across the full frequency spectrum Thoughtful Customization Reference pitch from 415 Hz (Baroque) to 466 Hz (bright orchestral) Capo support (0-12 frets) Sharp/flat display preference (A# vs Bb) Adjustable noise gate for any environment Optional in-tune chime (customizable sound) Keep screen on while tuning Premium Details Standby mode saves battery — tap to resume Home screen and Control Center widgets (iOS 18+) Siri Shortcuts for reference tones Live Activity during tuning sessions VoiceOver accessible with meaningful labels Respects Dynamic Type and Reduce Motion settings Built for Musicians, by Musicians REF-440 is a single-purpose tool that does one thing exceptionally well. No subscriptions, no premium upgrades, no feature gates. Just a tuner that works.

Your audio never leaves your phone. Tuner is a chromatic tuner that listens through your microphone and tells you the exact note you're playing — entirely on your device. No internet, no account, no tracking. Don't trust it? Turn on airplane mode: turn off Wi-Fi and cellular, and it keeps working. Nothing is ever recorded, and nothing is ever uploaded. Play a string, press a key, or sing a note. A big, clear note name fills the center (like A4), with the live frequency in Hz and a smooth 180-degree needle that swings with every cent. The moment you land in tune, the whole note glows yellow — you tune by feel, not by squinting at numbers. WHY OMITTUNER IS DIFFERENT Most tuners pay their bills with ads, accounts, or tracking of mic-adjacent data — or gate real accuracy behind a monthly subscription. Tuner does neither. No ads. No subscriptions. No accounts. PRIVATE BY DESIGN • Microphone audio is analyzed in memory and discarded instantly — never written to disk, never uploaded. • Pitch detection runs 100% on device with pure-DSP YIN math. No machine-learning model, no cloud, nothing sent to any server. • Zero analytics, zero telemetry, zero third-party SDKs. Privacy label: Data Not Collected. WHAT IT DOES • Real-time pitch detection, fast enough to follow your tuning peg as you turn it. • A huge, readable note name plus the live frequency in Hz — legible across a music stand. • A 180-degree needle that leans flat or sharp, and glows when you're within 5 cents. • Adjustable concert-pitch reference — 432, 438, 440, 442, or 444 Hz, one tap, remembered next time. • The screen stays awake mid-session so you can keep both hands on the instrument. GREAT FOR Guitar, bass, ukulele, violin, cello, bağlama / saz and other strings; brass and woodwind intonation checks; singers and choirs warming up; piano reference checks; students and teachers in any room. HONEST ABOUT WHAT IT IS Tuner reads what your microphone hears using 12-tone equal temperament to within about 5 cents, across 25–4500 Hz. It's an excellent everyday and practice-room tuner — it isn't a studio strobe and doesn't claim that precision. NO SUBSCRIPTIONS, NO ADS No subscriptions, no in-app purchases, no ads. That's the whole deal. Part of the Baro family — The tools you reach for first.