# REF-440 Tuner — Precision Instrument Tuner

> Precision Instrument Tuner (iPhone/iPad app by Amr Rashed.)

- Source: https://appshunter.io/ios/app/ref-440-tuner/id6757130720 (this page in markdown: same URL + `.md`)
- Developer: [Amr Rashed](https://appshunter.io/developer/1864768976)
- Category: Music, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English, Arabic, Dutch, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, Chinese (Simplified, China), European Spanish
- Released: 2026-01-06
- Data updated: 2026-06-09
- User reviews in markdown: https://appshunter.io/ios/app/ref-440-tuner/id6757130720/reviews.md

## What is REF?

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.


## Version history (last 4 releases)

### 1.4 — 2026-01-14

- Refined Brand Identity
- Standby Mode Improvements
- Tap anywhere to reset standby timer
- Screen now properly dims in standby
Bug Fixes
- Fixed standby timer tap detection
- Fixed screen staying on with "Keep screen on" disabled

### 1.3 — 2026-01-13

This update focuses on:
1. UX improvements with new animated onboarding flow
2. Fixed screen idle timer in standby mode
3. Tuning accuracy enhancements with magnetic snap system
4. Bug fixes including solfège display and LED indicator stability

### 1.2 — 2026-01-09

Dark Mode Redesign
• Completely redesigned dark theme with better contrast and visibility
• Grid lines and meters now properly visible in dark mode

Accessibility
• High-contrast mode support (iOS "Increase Contrast" setting)
• All colors meet WCAG AA accessibility standards

New Languages
• Arabic, German, Spanish, French, Italian, Japanese, Portuguese, Chinese

Improvements
• Better IDLE mode behavior - screen dims gradually
• Improved reset confirmation dialogs
• Various bug fixes and stability improvements

### 1.0 — 2026-01-07

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*