Comparison

FFT Plot vs Sound Decibel Meter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FFT Plot

This real-time audio analysis app provides precision sound measurement and visualization. It's ideal for detecting sound issues, room tuning, and speaker calibration, offering detailed frequency analysis for musicians and audio professionals.

Highlights
  • Real-time audio analysis
  • Frequency detection
  • Averaging options
  • Window functions
  • Linear and logarithmic scales
  • Weighting options
  • Draggable cursors
Read full description

***** "I use this app to detect sound feedback problems on live show and it became helpful and practic." FFT Plot is a powerful real-time audio analysis app. Designed with musicians and recording engineers in mind, it can also be used by anyone interested in the world of sound. Ideal for room tuning or speaker tuning, the app enables portable, precision audio measurement and visualization. Feature Highlights: ● FFT Size (2048 to 16384 points) ● Fast, Slow and Infinite Averaging ● Window function (Hamming, Hann, Rect) ● Peak Frequency detection ● Linear and Logarithmic scale ● Toggle between Flat, A and C weighting ● Pan to adjust visible dB range ● Draggable cursors ● iPhone X ready Audio credits: "Evening Birdsong" and "Cuckoo" by Benboncan

About

Sound Decibel Meter

Measure ambient noise levels with this clear, simple, and accurate app. It helps you monitor hearing health by detecting noise types, analyzing sound pressure, and syncing data with your Health app. Features include recording, sharing, and adherence to OSHA/NIOSH standards.

Highlights
  • Smart AI noise meter
  • Accurate sound pressure measurements
  • Sync with Health app
  • Sound recording and data saving
  • OSHA and NIOSH standards
  • Measurement range 20db to 160db
  • Microphone calibration
Features
Read full description

Our app is developed to measure the level of ambient noises. We have tried to make it as clear, simple and accurate as possible so that each person has the opportunity to quickly measure and monitor hearing health. To ensure precision, we calibrated our app using a real professional-grade sound meter. Key Features: - Smart AI noise meter to detect noise type - Accurate sound pressure measurements - Various types of audio waves - Sync with the Health app - track noise levels and monitor your hearing health - Reference table to compare noise levels - Various types of measurements: dBa, dBc, dBz - Sound recording and noise data saving - Possibility to share records - Convenient dosimeter - Selection of standards for allowable hearing loads: OSHA and NIOSH - Measurement range from 20db to 160db - Microphone calibration for more accurate measurements - Response speed settings - User-friendly and intuitive interface - Display of current, average and maximum values Our app has the possibility to synchronize with the Health app. To do this, you need to go to the app settings and turn on the health tab there. After that, information about the volume of the ambient noise will be transmitted to the Health app, so you can track the amount of consumed noise. You can also set the interval of data on the incoming noise. The app uses a microphone to track the sound pressure level. You can record information about the ambient noise in real time, as well as save all data in a playlist so that you can return to this data at any time. Do you work in high noise environments? Do you want to find out if the neighbors are not exceeding the permissible volume values? Or maybe you want to monitor the health of your ears? If yes, our app can serve you as a faithful assistant. Important! The application does not guarantee a 100% result, since the measurements you obtain depend on your device and may contain inaccuracies. For a more accurate result, it is better to calibrate the app or compare the obtained data with a professional sound level meter. ------------------------------- * Subscription: Get access to all premium functions of the app. * You can turn off the auto-renewal at any time: you'll find the option to do this change to a different payment plan in the settings of your iTunes and App Store account. * The first time you can try the free trial for 3 days. After that, your account will be automatically charged for the subscription if you will not stop it before the end of the free trial. * The length of the subscription is 1 month, this subscription is auto-renewing. You can stop the subscription at any moment; * Account will be charged for renewal within 24-hours prior to the and of the current period, and identity the cost of the renewal. ATTENTION: before you subscribe please read: Terms Of Use (https://shorturl.at/VFeKX) Privacy Policy (https://shorturl.at/FsZOG)

Screenshots

FFT Plot1 screens
Sound Decibel Meter4 screens

Verdict

The call

The clearest difference is price: Sound Decibel Meter at Free against FFT Plot's $9.99. Sound Decibel Meter also leads on update cadence (every 2 months vs every 17 months) and ratings volume (336 vs 90). FFT Plot's advantage is review sentiment (84% vs 40%) and in-app purchases (none vs 2). On ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Sound Decibel Meter is free to download; FFT Plot costs $9.99 up front. Sound Decibel Meter sells 2 in-app purchases, starting at $4.99 per month. FFT Plot asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FFT Plot holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 90 and 336 respectively. Written reviews point the same way: 84% of FFT Plot's written reviews are positive against 40% of Sound Decibel Meter's.

UpkeepUpdate frequency

FFT Plot ships an update every 17 months, Sound Decibel Meter every 2 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 2 level
FFT Plot versus Sound Decibel Meter: the parameters behind the verdict, then further details
ParameterFFT PlotSound Decibel Meter
Price$9.99Free — better
Rating4.8 (90 ratings) — better4.5 (336 ratings)
Positive reviews84.4% of reviews — better40.0% of reviews
Number of ratings90336 — better
Update frequencyEvery 17 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better15.6
Further details — not scored
Size7 MB18 MB
Age rating4+4+
DeveloperONYX AppsArpenik Katikyan

Customer experience

FFT Plot

All ratings90 ratings
Positive93.3%
Neutral2.2%
Negative4.4%
Written reviews109 reviews
Positive84.4%
Neutral6.4%
Negative9.2%

Sound Decibel Meter

All ratings336 ratings
Positive87.2%
Neutral3.6%
Negative9.2%
Written reviews35 reviews
Positive40.0%
Neutral8.6%
Negative51.4%

In-app purchases

None

FFT Plot

No in-app purchases

2 purchases

Sound Decibel Meter

Subscriptions2
  • Spectrogram-noise level tools3 Days trial$4.991 Month
  • Spectrogram-noise level tools3 Days trial$5.991 Month

Questions

Is FFT Plot free?
FFT Plot costs $9.99, with no in-app purchases.
Is Sound Decibel Meter free?
Sound Decibel Meter is free to download, with in-app purchases available.
Which has better reviews, FFT Plot or Sound Decibel Meter?
FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Sound Decibel Meter averages 4.5 from 336 ratings.
Do FFT Plot or Sound Decibel Meter have ads?
Neither FFT Plot nor Sound Decibel Meter shows ads.
Which is updated more often, FFT Plot or Sound Decibel Meter?
FFT Plot ships an update every 17 months, and Sound Decibel Meter every 2 months. Most recently, FFT Plot was updated on October 29, 2026 and Sound Decibel Meter on October 30, 2026.

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