Wow & Flutter Meter vVARY
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About this app
A tool that lets you analyse the wow and flutter of your cassette decks
The first-ever wow & flutter measurement tool built specifically for mobile devices.
No external gear and no special setup, just play your test tone into your phone’s mic.
For the first time, tape deck owners and Walkman collectors can now measure wow, flutter, and speed deviation with precision using only their Android device.
Real-time Frequency Detection
• Automatically detects standard reference tones (3,150 Hz or 3,000 Hz) for accurate tracking
WRMS and Q-Peak Wow & Flutter Measurement
• Industry-standard metrics displayed live
Speed Deviation Meter
• Shows ±% drift from the reference tone on a classic analog-style dial
Detailed Graphs for Analysis
• Speed vs Time: see drift, warble, and slow instability
• Flutter Spectrum: frequency breakdown reveals mechanical issues like capstan wobble
Flexible Controls
• Switch between 3,150 Hz and 3,000 Hz tone references
• Toggle WRMS scale (±0.1%, ±0.5%, ±1%)
• View scrolling waveform with up to 10 seconds of history
Mic-Only Operation
• No need for line-in adapters. This app works directly from your phone’s built-in mic
Whether you’re servicing gear, evaluating a new Walkman, or tracking the performance of a vintage deck, Wow & Flutter Meter puts the necessary testing tools in your pocket.
No external gear and no special setup, just play your test tone into your phone’s mic.
For the first time, tape deck owners and Walkman collectors can now measure wow, flutter, and speed deviation with precision using only their Android device.
Real-time Frequency Detection
• Automatically detects standard reference tones (3,150 Hz or 3,000 Hz) for accurate tracking
WRMS and Q-Peak Wow & Flutter Measurement
• Industry-standard metrics displayed live
Speed Deviation Meter
• Shows ±% drift from the reference tone on a classic analog-style dial
Detailed Graphs for Analysis
• Speed vs Time: see drift, warble, and slow instability
• Flutter Spectrum: frequency breakdown reveals mechanical issues like capstan wobble
Flexible Controls
• Switch between 3,150 Hz and 3,000 Hz tone references
• Toggle WRMS scale (±0.1%, ±0.5%, ±1%)
• View scrolling waveform with up to 10 seconds of history
Mic-Only Operation
• No need for line-in adapters. This app works directly from your phone’s built-in mic
Whether you’re servicing gear, evaluating a new Walkman, or tracking the performance of a vintage deck, Wow & Flutter Meter puts the necessary testing tools in your pocket.
Version Information
- Version
- -
- Downloads
- 500+
- Updated on
- -
- Released
- Jul 31, 2025
- Requires
- Android Varies with device
Ratings & Reviews
Developer Response