Comparison

FFT Plot vs Audio Spectrum Analyzer dB RTA

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

Audio Spectrum Analyzer dB RTA

Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.

Highlights
  • Octave Band Real-Time Analyzer
  • FFT Plot - Fast Fourier Transform
  • Integrated Sound Level Meter (dB-A)
  • Multispectral Harmonic Analyzer
  • Hold Max and Min Peaks
  • Various Window Functions
Features
Read full description

Spectrum Analyzer is full of fantastic advanced features you won’t find elsewhere easily! This app offers a fast and accurate spectrum analysis suitable for both amateur hi-fi enthusiasts and professional A/V engineers. This incredibly precise, pro level tool is perfect for tuning your home cinema, car stereo, subwoofers, and more. Spectrum analyser gives insight into your sounds and deconstructs the audio spectrum, showing the levels of the various frequencies in your audio signal. The built-in sound meter provides high-quality measurement results when measuring ambient noise levels in a multitude of real-life scenarios. Features include- ● Octave Band Real-Time Analyzer ● FFT Plot - Fast Fourier Transform ● Smooth HD Graphics ● Multispectral Harmonic Analyzer ● Integrated Sound Level Meter (dB-A weighted) FFT Features ● FFT size from 256 to incredible 16384 ● Hold Max and (unique feature) Min peaks ● Linear and Logarithm scales ● Various window functions: Rectangle, Hanning, Hamming, Tukey, Cosine, Lanczos, Blackman ● Max frequency live tracking ● Selected frequency live tracking ● Fullscreen mode Octave RTA features ● Bars and unique spline plot modes ● Full, 1/3, 1/6 octave modes ● Hold max mode ● Selected bar tracking. And much more... Please feel free to contact us with any questions, problems or ideas via e-mail support@lspapps.com. Privacy Policy - https://www.iubenda.com/privacy-policy/42622625 Terms of Use https://www.iubenda.com/terms-and-conditions/42622625

Screenshots

FFT Plot1 screens
Audio Spectrum Analyzer dB RTA3 screens

Verdict

The call

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against FFT Plot's $9.99. Audio Spectrum Analyzer dB RTA also leads on ratings volume (3K vs 90) and update cadence (every 5 months vs every 17 months). FFT Plot's advantage is review sentiment (84% vs 44%) 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

Audio Spectrum Analyzer dB RTA is free to download; FFT Plot costs $9.99 up front. Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 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. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K ratings behind it against 90, so its average is the more settled of the two. Written reviews point the same way: 84% of FFT Plot's written reviews are positive against 44% of Audio Spectrum Analyzer dB RTA's.

UpkeepUpdate frequency

FFT Plot ships an update every 17 months, Audio Spectrum Analyzer dB RTA every 5 months. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

Scorecard8 real differences · 2 level
FFT Plot versus Audio Spectrum Analyzer dB RTA: the parameters behind the verdict, then further details
ParameterFFT PlotAudio Spectrum Analyzer dB RTA
Price$9.99Free — better
Rating4.8 (90 ratings) — better4.5 (3K ratings)
Positive reviews84.4% of reviews — better43.6% of reviews
Number of ratings903K — better
Update frequencyEvery 17 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15
Further details — not scored
Size7 MB24 MB
Age rating4+4+
DeveloperONYX AppsMarina Polyanskaya

Customer experience

FFT Plot

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

Audio Spectrum Analyzer dB RTA

All ratings3,042 ratings
Positive87.7%
Neutral4.1%
Negative8.2%
Written reviews484 reviews
Positive43.6%
Neutral7.4%
Negative49.0%

Bugs and requests

FFT Plot

Not enough reviews yet to summarise bugs or requests.

Audio Spectrum Analyzer dB RTA

Reported bugs

3 issues
  • Freezing and crashing on certain devices
  • Incorrect frequency readings in Octave RTA mode
  • Inability to switch between microphone sources

Requested features

4 requests
  • External microphone support
  • Ability to save and compare measurement results
  • More detailed instructions and tutorials
  • Vertical orientation option

In-app purchases

None

FFT Plot

No in-app purchases

2 purchases

Audio Spectrum Analyzer dB RTA

Subscriptions1
  • Premium Access3 Days trial$1.991 Month
One-time1
  • Spectrum Analyzer Pro$7.99

Questions

Is FFT Plot free?
FFT Plot costs $9.99, with no in-app purchases.
Is Audio Spectrum Analyzer dB RTA free?
Audio Spectrum Analyzer dB RTA is free to download, with in-app purchases available.
Which has better reviews, FFT Plot or Audio Spectrum Analyzer dB RTA?
FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Audio Spectrum Analyzer dB RTA averages 4.5 from 3K ratings.
Do FFT Plot or Audio Spectrum Analyzer dB RTA have ads?
Neither FFT Plot nor Audio Spectrum Analyzer dB RTA shows ads.
Which is updated more often, FFT Plot or Audio Spectrum Analyzer dB RTA?
FFT Plot ships an update every 17 months, and Audio Spectrum Analyzer dB RTA every 5 months. Most recently, FFT Plot was updated on September 23, 2026 and Audio Spectrum Analyzer dB RTA on September 22, 2026.

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