Wow & Flutter Meter

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.