Grainote - Guitar Tuner
Guitar Tone & Tuning Tracker
Free · Designed for iPad. Not verified for macOS.
Visualize your guitar's unique acoustic fingerprint. Discover your instrument's character by comparing with the same model.
GRAINOTE is a tuner and acoustic data tracker for guitarists.
Every time you tune, GRAINOTE automatically records the acoustic characteristics of your strings, building a unique "acoustic fingerprint" of your guitar over time.
【Key Features】
■ Precision Chromatic Tuner
Detects the fundamental frequency of each string in real time, supporting precise tuning down to the cent.
■ Acoustic Profile Recording
Each tuning session automatically saves:
· Fundamental strength (dB)
· 2nd–5th harmonic ratios
· Spectral centroid (brightness)
· Sustain score
■ Harmonic Spectrum Display
Play a string to see its frequency spectrum in real time — visualize the harmonic structure of your guitar's tone.
■ Tuning History
Browse past session data and track how your strings' acoustic properties change over time.
■ Model Comparison (Coming Soon)
Compare your data anonymously with other players using the same brand and model. Discover what makes your guitar unique.
■ Multi-Guitar Management
Register and manage multiple guitars with details like brand, model, and string gauge.
【Privacy】
Only acoustic numerical data is collected (harmonic ratios, frequency values, sustain scores, etc.). Audio is never recorded or stored. All data is processed anonymously.
A4 reference pitch is adjustable from 432 Hz to 446 Hz. Microphone access is required.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Yuji Sakurai, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Yuji Sakurai
- Size
- 62.2 MB
- Category
- Music
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2025 Yuji Sakurai