# Ivory Pro: Piano Tuner Pro — Acoustic Pitch & Metronome App > Professional piano tuning suite with advanced DSP for acoustic precision. (iPhone/iPad app by Lei Feng.) - Source: https://appshunter.io/ios/app/ivory-pro-piano-tuner-pro/id6770356763 (this page in markdown: same URL + `.md`) - Developer: [Lei Feng](https://appshunter.io/developer/1041447953) - Category: Utilities, Music - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.0 · 6 MB - Languages: American English - Released: 2026-05-19 - Data updated: 2026-08-03 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ivory-pro-piano-tuner-pro/id6770356763/reviews.md ## What is Ivory Pro? IVORY PRO - The Professional-Grade Piano Tuner for the Apple Ecosystem **Engineered for Ultimate Acoustic Precision** Ivory Pro is a masterclass tuning suite for piano technicians and professional musicians. Leveraging a custom hybrid DSP engine, Ivory Pro delivers sub-cent frequency accuracy across the complete 88-key piano range (A0 to C8). Experience the power of professional bench-tuning equipment on your iPhone, iPad, or Mac. **Specialized Piano Profiles** Built-in physical models optimized for specific architectures: • **Concert Grand:** Smooth, highly-damped response for slow-decaying strings. • **Upright:** Balanced physics for shorter strings. • **Electric Piano:** Lightning-fast detection for Rhodes/Wurlitzer tines. • **Spinet:** High-damping for highly-inharmonic configurations. • **Custom Mode:** Fully adjust DSP smoothing, needle response, damping, and noise gates. **Client & Profile Manager** Organize your work with an integrated database. Save custom profiles for specific clients and instruments. Profiles store names, notes, A4 references, DSP settings, and historic temperaments—restoring the exact environment per client. **Inharmonicity-Aware Stretch Tuning** Pianos cannot be tuned to perfect equal temperament due to string stiffness. Ivory Pro integrates a real-time Railsback stretch tuning engine. Use the **Inharmonicity Profile Wizard** to measure the actual string physics of your piano, generating a custom, mathematically perfect stretch curve based on professional octave-harmonic matching (6:3, 4:2, 2:1 rules). **Smart Pitch Raise & Tuning History** The built-in Pitch Raise Wizard automatically calculates tension deficits to generate a perfectly tailored overpull profile. Document your work with complete Tuning History snapshots, graphing pitch drift over time to track long-term structural stability. **Historic Temperaments** Explore historic temperaments with mathematically precise offsets for Werckmeister III, Kirnberger III, and Meantone (1/4 Comma). **Professional Visualizers** • **Strobe Tuning:** The ultimate standard for precision. A dynamic, multi-band concentric strobe ring visually rotates based on phase offset, providing sub-cent accuracy at a glance. • **Harmonic Spectrum Analyzer:** A 60fps FFT plot renders the live spectrum of your strings, letting you visually spot false beats and analyze overtone strength. **State-of-the-Art Hybrid DSP Engine** • **Low-End Power:** Custom sub-harmonic filters track bottom keys (A0–B0) without octave errors. • **Treble Brilliance:** High-resolution FFT and parabolic interpolation guarantee sub-cent tracking on the top octave. • **Advanced Thresholds:** Customize Treble Sensitivity and Bass Inharmonicity Tolerance. **USB & External Microphone Support** • Plug-and-play detection for any class-compliant USB audio interface. • Live display of device name, sample rate, and channels. • Automatic software gain boost and multi-channel downmix. **Premium Mechanical Metronome** • Real-time physical pendulum swing animation. • High-fidelity wooden, electronic, and pitched click sounds. • Support for complex time signatures, tap-tempo, and live polyrhythms. • Build Setlists for seamless transitions during gigs or practice. **"Midnight Onyx" Interface** • Designed for dark concert halls and piano interiors. • Vibrant glassmorphic controls with responsive needle physics. • Tactile haptic feedback lets you "feel" perfect pitch. **Universal & Offline Privacy** • **Universal Purchase:** Buy once, unlock full features across Mac, iPhone, and iPad. • **100% Privacy:** No data collection, zero tracking. All DSP processing happens locally. ## Key features - Custom hybrid DSP engine - Sub-cent frequency accuracy - Specialized piano profiles - Client & Profile Manager - Inharmonicity-aware stretch tuning - Pitch Raise Wizard - Historic temperaments ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Ivory Pro Unlimited Lifetime Unlock | $9.99 | one-time | ## Frequently asked questions about Ivory Pro ### What is Ivory Pro? Ivory Pro is a professional-grade piano tuning suite designed for acoustic precision. It utilizes a custom hybrid DSP engine to achieve sub-cent frequency accuracy across the entire 88-key piano range. ### Does Ivory Pro have ads? No, Ivory Pro is ad-free. As a free application with in-app purchases, it provides an uninterrupted tuning experience for its users. ### What devices does Ivory Pro support? Ivory Pro is available for iPhone and iPad, offering professional tuning capabilities on Apple devices. ### How accurate is Ivory Pro? Ivory Pro delivers sub-cent frequency accuracy, which is the standard for professional bench-tuning equipment. It uses advanced DSP and visualizers like the Strobe Tuning feature for precise adjustments. ### Can Ivory Pro tune different types of pianos? Yes, Ivory Pro includes specialized piano profiles optimized for Concert Grand, Upright, Electric Piano, and Spinet architectures. It also offers a Custom Mode for fine-tuning DSP settings. ### What is the Inharmonicity Profile Wizard? The Inharmonicity Profile Wizard measures the actual string physics of your piano to generate a custom stretch curve. This ensures a mathematically perfect tuning based on professional octave-harmonic matching rules. ### How often is Ivory Pro updated? Ivory Pro was last updated on June 19, 2026, with version 1.4. This indicates a commitment to ongoing development and improvements for the application. ### What historic temperaments does Ivory Pro support? Ivory Pro supports mathematically precise offsets for historic temperaments including Werckmeister III, Kirnberger III, and Meantone (1/4 Comma). ## Version history (last 5 releases) ### 1.5 — 2026-08-01 VERSION 1.5 — CLOUD SYNC, PDF REPORTS, & POLYRHYTHM METRONOME New: iCloud Sync for Professionals • Take your work anywhere! Custom Piano Profiles and Metronome Setlists now seamlessly sync across all your devices using iCloud. Create a profile on your iPhone in the field and view it on your iPad at home. New: Export PDF Tuning Reports • Generate professional, branded PDF reports based on a piano's Tuning History snapshot. Easily view cents deviations for all 88 keys and export the PDF via AirDrop, Email, or Print to hand directly to your clients. New: Premium Metronome Soundscapes • We've completely overhauled the metronome click engine with high-fidelity, sample-accurate soundscapes. Choose between Mechanical, Natural Woodblock, Vintage Clock, Grand Pendulum, Drum Kit, Cowbell, and a crisp Digital Click. Feel the beat with synchronized haptic feedback! New: Smart Pitch Raise Wizard • Overpull is now smarter than ever. The new Pitch Raise Wizard samples notes across the bass, mid, and treble sections to calculate the exact tension deficit of your piano. It automatically generates a customized, multi-band overpull profile to guarantee your strings settle perfectly to pitch. New: Tuning History & Drift Tracking • Piano technicians can now take a complete "Snapshot" of a piano's tuning state. Do a quick chromatic sweep to record the exact cents deviation of all 88 keys. • View the Historical Drift graph to see exactly how much the piano has shifted since the last visit, helping you adjust your tuning frequency and identify structural instability. New: Inharmonicity Curve Visualizer • The custom Piano Profile manager now features a beautiful, real-time line chart that plots your custom inharmonicity curve (Railsback stretch) and the exact data points measured by the DSP engine. New: Metronome Setlists • Create, save, and organize Setlists for your gigs or practice sessions! Save tempos, time signatures, and custom sounds for an unlimited number of songs, making transitions completely seamless. • Setlist Quick-Access: Your saved setlist songs now automatically integrate directly into the tuner's main metronome panel! They dynamically merge with classic tempo presets (Largo, Presto, etc.) and sort beautifully by tempo, allowing you to swipe and switch songs instantly without ever opening a menu. New: Live Polyrhythms & Subdivisions • Practice complex rhythms effortlessly. The metronome now supports simultaneous polyrhythms (e.g., 3-against-2, 4-against-3) and full subdivisions (Eighths, Triplets, Sixteenths) playing in perfect sync. New: Advanced Acoustic DSP Thresholds • Gain total control over the acoustic DSP engine! Adjust the "Treble Sensitivity" multiplier to lock onto the fast-decaying "ping" of top notes (C7-C8). • Use the "Bass Inharmonicity Tolerance" multiplier to allow the sub-harmonic filter to lock onto weaker bass fundamentals hidden beneath muddy overtones (A0-B0). Improvements & Fixes • UI Refactoring: Both the Tutorial and Settings screens have been completely redesigned using modern swipeable paginated tabs. Finding and adjusting settings is now faster, cleaner, and strictly categorized into General, Profiles, Engine, and About tabs. • Streamlined Settings & Profiles: The Profile Manager now serves as a clean, read-only summary for your tuning parameters. All interactive controls, including the Reference Pitch (A4), have been logically consolidated into the active tuning tabs (such as the Stretch tab) for immediate access while tuning. • Improved UI rendering for charts and visualizers across all devices. • Reorganized the Profile Manager settings to streamline technician workflows. ### 1.4 — 2026-06-19 VERSION 1.4 — ADVANCED TUNING TOOLS & POLYRHYTHM METRONOME New: Smart Pitch Raise Wizard • Overpull is now smarter than ever. The new Pitch Raise Wizard samples notes across the bass, mid, and treble sections to calculate the exact tension deficit of your piano. It automatically generates a customized, multi-band overpull profile to guarantee your strings settle perfectly to pitch. New: Tuning History & Drift Tracking • Piano technicians can now take a complete "Snapshot" of a piano's tuning state. Do a quick chromatic sweep to record the exact cents deviation of all 88 keys. • View the Historical Drift graph to see exactly how much the piano has shifted since the last visit, helping you adjust your tuning frequency and identify structural instability. New: Inharmonicity Curve Visualizer • The custom Piano Profile manager now features a beautiful, real-time line chart that plots your custom inharmonicity curve (Railsback stretch) and the exact data points measured by the DSP engine. New: Metronome Setlists • Create, save, and organize Setlists for your gigs or practice sessions! Save tempos, time signatures, and custom sounds for an unlimited number of songs, making transitions completely seamless. New: Live Polyrhythms & Subdivisions • Practice complex rhythms effortlessly. The metronome now supports simultaneous polyrhythms (e.g., 3-against-2, 4-against-3) and full subdivisions (Eighths, Triplets, Sixteenths) playing in perfect sync. New: Advanced Acoustic DSP Thresholds • Gain total control over the acoustic DSP engine! Adjust the "Treble Sensitivity" multiplier to lock onto the fast-decaying "ping" of top notes (C7-C8). • Use the "Bass Inharmonicity Tolerance" multiplier to allow the sub-harmonic filter to lock onto weaker bass fundamentals hidden beneath muddy overtones (A0-B0). Improvements & Fixes • UI Refactoring: Both the Tutorial and Settings screens have been completely redesigned using modern swipeable paginated tabs. Finding and adjusting settings is now faster, cleaner, and strictly categorized into General, Profiles, Engine, and About tabs. • Streamlined Settings & Profiles: The Profile Manager now serves as a clean, read-only summary for your tuning parameters. All interactive controls, including the Reference Pitch (A4), have been logically consolidated into the active tuning tabs (such as the Stretch tab) for immediate access while tuning. • Improved UI rendering for charts and visualizers across all devices. • Reorganized the Profile Manager settings to streamline technician workflows. ### 1.3 — 2026-06-08 VERSION 1.3 — HISTORIC TEMPERAMENTS, STROBE TUNING & SPECTRUM ANALYZER New: Historic Temperaments • Go beyond Equal Temperament with mathematically perfect cents offsets for Werckmeister III, Kirnberger III, and Meantone (1/4 Comma). Built-in preset profiles make switching temperaments instant. New: Strobe Tuning Visualizer • Achieve the ultimate precision with a beautifully rendered, multi-band concentric strobe ring. The fundamental, 2nd harmonic, and 3rd harmonic rings rotate dynamically based on your exact pitch offset, locking perfectly still when a string is perfectly in tune. New: Harmonic Spectrum Analyzer • A lightning-fast, 60fps FFT wave graph sits directly on the main tuning screen. Visually inspect the harmonic partials of your strings to spot false beats, verify inharmonicity, and analyze overtone strength in real time. New: Pitch Raise (Overpull) Calculator • Stop chasing falling pitches. Activate Overpull mode, lock in your flat string's measurement, and Ivory Pro will automatically shift your tuning needle target by your chosen percentage (up to 30%), ensuring the string settles perfectly at pitch. Improvements & Fixes • Drastically improved pitch detection stability for extreme high and low keys. • Redesigned and improved the landscape UI for a better tuning experience on iPad and rotated iPhones. • Tweaked the Anti-Flutter shield and updated built-in presets for more reliable needle behavior. • Built-in Reference Tone generator now utilizes high-precision, sample-accurate synthesis for perfect pitch output. • Fixed a UI layout issue where the top header could be partially covered by the Dynamic Island on newer iPhones. ### 1.2 — 2026-06-06 VERSION 1.2 — CUSTOM PIANO PROFILE MANAGER, INHARMONICITY WIZARD & AUTO-CALIBRATION New: Inharmonicity Profile Builder Wizard • A step-by-step wizard that guides you through measuring string stiffness (inharmonicity) for reference notes A1, A3, A5, and C6. It runs live overtone FFT analysis to calculate string stiffness constants (B), interpolates a full 88-key profile, and generates custom Railsback cents offsets using professional octave-harmonic matching standards (6:3 rule for bass, 4:2/2:1 rules for treble). New: Client & Piano Profile Manager • Create, load, duplicate, edit, and delete custom profiles for specific clients and instruments. Custom profiles store name, client details, notes, A4 reference pitch, stretch tuning choices, DSP smoothing window, needle response/damping, and mic sensitivity — fully restoring the complete tuning environment per client. New: Auto-Calibrate A4 Reference Pitch • Quickly calibrate your A4 tuning reference (436–444 Hz) by listening to an external tuning fork or sustained tone. Rejects frequency outliers using a median-based filter to guarantee calibration accuracy. New: Dynamic Stretch Intensity Slider • Manually adjust the intensity of the Railsback stretch tuning curve from 1.0 to 4.0 with real-time UI labeling matching the scale (Mild Upright, Standard Grand, Deep Concert Grand). Expanded Pro Settings • The following settings are now exclusive to Pro subscribers and clearly marked in the UI with a lock icon: A4 Reference Pitch, Auto-Calibrate A4, Key Transposition, Auto-Start Listening, DSP Smoothing, Needle Response, Needle Damping, Noise Gate Threshold, and External Mic Input Gain. Free users tapping any locked setting are directed to the upgrade paywall. UI & Quality-of-Life Improvements • Auto-pause and resume listening: Microphone listening automatically pauses when Settings is opened and resumes instantly upon dismissal. • No horizontal scrolling: Fully locked all settings, profile lists, and wizard screens to vertical-only scrolling, preventing layout shift or horizontal bouncing. • Streamlined transposition picker: Keys now display as clean, responsive labels (C, Bb, Eb, F) that fit beautifully on all device models. • Fresh install detection: Trial timer is preserved securely in the iOS Keychain across uninstalls, preventing trial abuse via reinstalls. ### 1.1 — 2026-05-25 • Tap the new Play A4 button in the header to play the current A4 reference pitch (e.g. 442 Hz) directly through the speaker. The tuner continues listening simultaneously — play a string alongside the tone to tune by ear with perfect precision. Tap again to stop. **Improved Metronome — 7 Real-Instrument Sound Themes** • Metronome click engine rebuilt with sample-accurate scheduling for rock-solid timing at any BPM. • Seven high-fidelity recorded sound themes (CC0 licensed): - **Mechanical** — classic wooden metronome tick with bell accent - **Percussive** — solid woodblock with metal bell accent - **Vintage Clock** — warm vintage tick character - **Grand Pendulum** — deep weighted-pendulum swing - **Rimshot** — snappy snare rimshot - **Cowbell** — cowbell click (yes, more cowbell) - **Drum Kit** — kick drum downbeat with bell accent **Tuning Accuracy Fixes** • **Corrected pitch detection for non-standard A4 reference frequencies** — A parabolic interpolation sign error in the core DSP engine caused the detected frequency to drift in the wrong direction when A4 was set away from 440 Hz. For example, a 442 Hz reference tone was incorrectly detected as ~438 Hz (~13 cents flat). Both the NSDF autocorrelation stage and the FFT refinement stage are now fixed, giving accurate sub-cent detection at any A4 reference (438–445 Hz). • **Fixed cents indicator always reading sharp when A4 is not 440 Hz** -- Changing A4 in Settings now immediately and correctly updates the cents display. A 442 Hz tone with A4 = 442 Hz now correctly reads 0 cents (dead center). **Bug Fixes** • Trial banner no longer appears after purchase, even if the 7-day trial period has not yet expired. **Header UI Improvements** • Buttons grouped closer together and shifted toward the trailing edge, giving the title and pitch label more horizontal room on smaller screens. • "PRO · LISTENING" status badge no longer wraps to a second line on narrow displays. ## More apps by Lei Feng - [File Property Edit](https://appshunter.io/ios/app/file-property-edit/id1041447954) - [PhotoTagEdit](https://appshunter.io/ios/app/phototagedit/id1068220710) - [BatchRename: Bulk File Renamer](https://appshunter.io/ios/app/batchrename-bulk-file-renamer/id1176825911) - [TractorCards](https://appshunter.io/ios/app/tractorcards/id6757169177) - [SimpleSolitaireCard](https://appshunter.io/ios/app/simplesolitairecard/id6757280213) - [Bloom Garden Puzzle](https://appshunter.io/ios/app/bloom-garden-puzzle/id6757341561) All apps by Lei Feng: https://appshunter.io/developer/1041447953 --- *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 2026-08-03.*