Supported Features
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Voice Control
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Larger Text
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Dark Interface
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Differentiate Without Colour Alone
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Sufficient Contrast
REF-440 Tuner
Precision Instrument Tuner
Free · Designed for iPad. Not verified for macOS.
Tune with confidence. REF-440 delivers professional-grade accuracy in a beautiful, distraction-free interface that feels like a precision instrument, not an app.
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.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
- 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
The developer, Amr Rashed, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Size
- 5.9 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 9 more
- English, Arabic, Dutch, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Provider
Amr Rashed
- Amr Rashed has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
- Address
Johannis de Rijkestraat 11
1018RM Amsterdam
Netherlands - Phone Number
+31 655952789 - Email
amrkamalrashed@gmail.com
- Copyright
- © 2026 Amr Rashed