Wow & Flutter Meter is a mic-based mobile tool that enables cassette-deck enthusiasts to measure wow, flutter, and speed deviation without external gear. It delivers real-time frequency detection, WRMS and Q-Peak metrics, plus detailed graphs for precise analysis—right from your Android device. Total downloads reach 1,000+, with 170 downloads in the last 30 days.
Pros & Cons
No external gear required; mic-based testing directly from your phone
Real-time metrics: WRMS & Q-Peak provide industry-standard insights
Tailored for vintage playback gear (cassette decks, Walkmans)
Compact, mic-only workflow suitable for field testing
No explicit data export or calibration workflow described in the feature set
Rating is 0.0 from 0 ratings, which may reflect limited user feedback
Not ranked in any top list, potentially limiting discoverability compared to competitors
About Wow & Flutter Meter
Wow & Flutter Meter was a tools app developed by SK Corp Apps. It was removed from Google Play Mar 12, 2026 and is no longer available for download.
Download Statistics
Wow & Flutter Meter had been downloaded 1.1 thousand times before it became unavailable.
User Ratings
The app had no ratings.
App Information
Wow & Flutter Meter was free to download. The APK download size was 11.49 MB. The last available version was 1.5. The last update was on September 29, 2025.
Technical Requirements
The app had a content rating of Everyone. The app had been available on Google Play August 2025.
Description
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.
Recent changes: Increased frequency reading range before counter drops out.
Get a detailed PDF report for Wow & Flutter Meter with download trends, rating history,
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★★★★★
Nice app. Working fine for me on a Motorola phone running android 15, the numbers it reports are consistent with wfgui. And ad free !
★★★★★
I use this to test wow & flutter on my turntables. My compliments to you for coming up with a mobile version that works on Android using the phone's microphone instead of line inputs. On my wishlist, it would be awesome if you could let the app take a 15 to 30 second sample of the test tone (length of time being user selectable), then show the average wow & flutter RMS average at the end of the sample. Perhaps this feature could be added to a paid version. Thanks for creating the app!
★★☆☆☆
So useless. I was trying to check wow and flutter, but if your deck runs a little fast (which I know it does), it doesn't measure. It doesn't pick up anything over 3210hz while set on 3150. My deck runs @3230, which is less than +2% faster. This app has gauges that say can measure even +5% faster/lower speed but over 1% and a bit it doesn't pick up the tone anymore. it's useless for me. I can't measure wow and flutter. (and so that you know: a lot of tape decks run a bit faster and that's ok)
Technologies used by Wow & Flutter Meter
Wow & Flutter Meter is requesting 4 permissions and we don't have library information (yet).
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Trust & Safety: Requested permissions include ACCESS_NETWORK_STATE and RECORD_AUDIO, plus CHECK_LICENSE and DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION. The app relies on microphone input for measurements and a license check for distribution. No other sensitive permissions are listed, making the safety profile consistent with mic-based utility apps; overall risk appears low.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
