Wow and Flutter Turntable RPM
Analog VU Meter Calibrator
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Are you sure your turntable is perfectly calibrated? Even high-end audio systems lose their true sound with a 0.1 RPM deviation.
Wow and Flutter is a professional-grade calibration tool designed for audiophiles. Simply place your phone on the platter. Using strictly the device's built-in gyroscope (no cameras, no vision AI, 100% offline), it measures your turntable's rotational speed and microscopic variations (Wow and Flutter) up to two decimal places. Experience the heavy brutalist analog VU meter interface and feel the haptic feedback when you hit the perfect 33.33 RPM.
FREE FEATURES:
- 33 & 45 RPM measurement
- Real-time VU meter with needle animation
- Wow & Flutter percentage display
- Haptic feedback at target lock
- 5 free measurement sessions
UNLOCK PRO ($6.99 one-time):
- Unlimited measurement sessions
- 16 & 78 RPM speed modes
- Real-time RPM time-series graph
- W&F quality grade badge (Excellent/Good/Fair/Poor)
- Save measurements & full history log
- RPM calibration offset tool
Terms of Use: https://prizmchain.github.io/wnf-terms-of-service.html
Privacy Policy: https://prizmchain.github.io/wnf-privacy-policy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.1.0 makes calibration smoother and more reliable.
• Added Italian and Brazilian Portuguese
• Improved purchase and restore handling
• Optimized the layout for compact iPhones
• Improved accessibility and overall stability
The developer, NOH HIYEONG, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- NOH HIYEONG
- Size
- 34.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- W&F Pro $6.99
- Copyright
- © 2026 Prizm. All rights reserved.