Comparison

Audio Kit 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

Audio Kit

This app provides four essential audio analysis tools: a real-time spectrum analyzer, a waveform scope, an SPL meter, and a signal generator. It helps audio professionals visualize and measure sound characteristics with detailed controls and calibration options.

Highlights
  • Real-time Spectrum Analyzer
  • Waveform Scope
  • SPL Meter with A-weighting
  • Signal Generator (Sine, White, Pink Noise)
  • Sweep Generation (In-App Purchase)
  • Screen Capture
Features
Read full description

Audio Kit is a collection of four tools which are essential for those working in audio, sound and music. A real time Spectrum Analyser, a Scope to display waveforms, an SPL (Sound Pressure Level) Meter, and a Signal Generator producing sine waves, white noise and pink noise. Sweep generation with In App Purchase. 
 -View a real time spectrum of audio with the Spectrum Analyser and identify peak frequencies precisely 
-View the actual waveform of the audio signal with the Scope 
-An SPL Meter provides measurement of sound levels using an A-weighting 
-The Signal Generator provides a sine wave output up to 20,000Hz in 1 Hz steps, along with noise generators for white and pink noise. Sweep generation with In App Purchase ** Spectrum
 ** FFT (Fast Fourier Transform) is used to calculate the frequencies in the Spectrum Analyser and these are displayed in real time. The frequency is displayed in either logarithmic or linear scale. Three FFT sizes of 8192, 4096 and 2048 are selectable, giving fine resolution of frequencies. Interpolation gives resolution to within 1Hz. 
6 different FFT window function types can be selected - Hamming, Hann, Rectangular, Bartlett, Triangular and Blackman. 
 Number of FFT windows can be selected from 1 through 4. The strongest frequency is displayed both above the peak, and optionally, in a large number display in the center of the screen. The large number display can be quickly switched on or off by double tapping the screen.
 There is a screen capture facility in the Spectrum Analyser allowing you to save the spectra for future reference along with details of the FFT parameters, time and date.
 A single tap freezes the screen. Other features such as screen capture and double tap to toggle large number display still work during the freeze. This feature can be turned off in preferences if it’s not desired.
 ** Scope ** The display of the Scope can be adjusted easily using pinch gestures in both horizontal and vertical directions. Zero crossing detection of the waveform provides a smooth display and can be set to either positive or negative direction zero crossing. 

There is a screen capture facility in the Scope allowing you to save waveforms for future reference.
 ** SPL Meter ** 
The SPL Meter continuously displays the sound pressure level using an A-weighting, and has resettable minimum and maximum displays also. SPL Meter can be calibrated against a reference standard or meter. SPL Meter has a continuous ticker style trace of the SPL over time.
 ** Signal Generator ** 
 The Signal Generator has 3 different output types: - Sine wave - White noise - Pink noise 
The output of the Signal Generator can be viewed on the other parts of the App.
 The sine wave frequency selected using picker wheels allows for accurate control of frequency to within 1Hz. Volume for the sine wave and noise signals is continuously adjustable.

 With an In App Purpose one can add a sine wave sweep generator functionality to the Signal Generator. The sweep generator can sweep increasing and decreasing frequencies, and using either a linear or log sweep rate. **Settings
 ** All of the user preferences in each of the above applications can be made persistent between restarts of the App. All parts of the App have direct access to a help document. Audio Kit - essential for those working in audio, sound and music.

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

Audio Kit4 screens
Audio Spectrum Analyzer dB RTA3 screens

Verdict

The call

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against Audio Kit's $2.99. Audio Spectrum Analyzer dB RTA also leads on rating (4.5 vs 3.5) and ratings volume (3K vs 6). Audio Kit's advantage is review sentiment (76% vs 44%). On update cadence, ads, in-app purchases and monetization model 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; Audio Kit costs $2.99 up front. Audio Kit sells 1 one-off in-app purchase and Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Audio Spectrum Analyzer dB RTA holds the better App Store score, 4.5 against 3.5. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 76% of Audio Kit's written reviews are positive against 44% of Audio Spectrum Analyzer dB RTA's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Audio Kit ships an update every 6 months, Audio Spectrum Analyzer dB RTA every 5 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

Scorecard4 real differences · 6 level
Audio Kit versus Audio Spectrum Analyzer dB RTA: the parameters behind the verdict, then further details
ParameterAudio KitAudio Spectrum Analyzer dB RTA
Price$2.99Free — better
Rating3.5 (6 ratings)4.5 (3K ratings) — better
Positive reviews76.3% of reviews — better43.6% of reviews
Number of ratings63K — better
Update frequencyEvery 6 monthsEvery 5 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615 — better
Further details — not scored
Size2 MB24 MB
Age rating4+4+
DeveloperSinusoid Pty LtdMarina Polyanskaya

Customer experience

Audio Kit

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews38 reviews
Positive76.3%
Neutral2.6%
Negative21.1%

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

Audio Kit

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

1 purchases

Audio Kit

One-time1
  • Sweep Generator for Audio Kit$1.99
2 purchases

Audio Spectrum Analyzer dB RTA

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

Questions

Is Audio Kit free?
Audio Kit costs $2.99, and also offers 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, Audio Kit or Audio Spectrum Analyzer dB RTA?
Audio Spectrum Analyzer dB RTA is rated higher. Audio Kit averages 3.5 out of 5 from 6 ratings, while Audio Spectrum Analyzer dB RTA averages 4.5 from 3K ratings.
Do Audio Kit or Audio Spectrum Analyzer dB RTA have ads?
Neither Audio Kit nor Audio Spectrum Analyzer dB RTA shows ads.
Which is updated more often, Audio Kit or Audio Spectrum Analyzer dB RTA?
Audio Kit ships an update every 6 months, and Audio Spectrum Analyzer dB RTA every 5 months. Most recently, Audio Kit was updated on November 1, 2026 and Audio Spectrum Analyzer dB RTA on October 29, 2026.

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