Comparison

Audio / Spectrum Analyzer vs STETSOM STX DSP

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

Head to head
About

Audio / Spectrum Analyzer

This application analyzes audio input from your microphone, displaying both the waveform and amplitude spectrum in real-time. It offers extensive customization for display, calculation, and signal generation.

Highlights
  • Simultaneous waveform and spectrum display
  • Configurable display layouts
  • Selectable FFT size and averaging
  • Frequency weighting options (Flat, dBA, dBC)
  • Octave band analysis
  • Audio signal and noise generation
  • Peak hold and pitch meter
Read full description

This RTA app supports simultaneous display of "Audio Waveform", as well as the FFT-based "Amplitude Spectrum" (frequency magnitude) and "Spectrogram" (frequency distribution over time), for audio signals input from a microphone. (FFT: Fast Fourier Transform, RTA: Real Time Analyzer) [Features] - Supports simultaneous display of Waveform / Spectrum / Spectrogram - Supports orientation both portrait and landscape - FFT size - Window function - Spectrum average - Spectrum Tilt - Frequency weighting (Flat, dBA, dBC) - The type of expressing the frequency of Spectrum / Spectrogram (Linear, Log) - Displays the peak level and its frequency of the spectrum - Peak Hold (displays the results of holding past peak values ​​of the spectrum) - Octave Analysis (displays the spectrum divided into octave bands) - Generates the audio signal (Sine, Triangle, Squire, Saw) - Generates the noise signal (white noise, pink noise) - Pitch meter display The Pro version offers Ad-Free Viewing and High-Resolution Analysis (FFT size: 16384, 32768, Spectrum Average: 4, 8). [Setting items] 1. Screen structure : Select the display screen configuration. View Num : 1, 2 View Type : - 1 screen : Wave (Waveform) / 1D (Spectrum) / 2D (Spectrogram) - 2 screens : W+1D / W+2D / 1D+2D Layout : Vertical / Horizon 2. Frequency Axis Scale Type : Selectable the type of expressing the X direction (frequency) of Spectrum / Spectrogram. - Linear: Distributed at equal intervals - Log: The intervals increase logarithmically 3-1. FFT size : 1024, 2048, 4096, 8192, 16384, 32768 (* 16384, 32768 is available in the Pro version.) 3-2. Window function : Hanning, Hamming, Blackman, No window 4. Spectrum Average Number of spectrum average for a display of spectrum. 1, 2, 4, 8 (init value: 1) (* 4 and 8 are available in the Pro version.) Higher value will make the spectrum less noisy and more smooth, at the cost of lower time resolution. 5. Spectrum Tilt : Compensates the visual slope of the spectrum around a 1 kHz pivot. -6.0 to +6.0 dB/oct in 0.5 dB/oct steps (0 means no tilt). 6. Frequency Weighting : Selectable frequency weighting. - Flat: No frequency weighting is applied. - dB(A): Frequency response that takes into account human hearing. - dB(C): Relatively flat response. 7. Peak Hold : Displays the results of holding the past maximum values ​​(peak values) of the spectrum. 8. Octave Analysis : Displays the results of classifying the spectrum into octave bands. Division method: - FFT: Spectral display - 1/24, 1/12, 1/6, 1/3, 1 octave: Display divided into octave bands Calc method: - Max: Displays the maximum spectrum value in each band - Average: Displays the average spectrum value in each band 9. Generates the audio signal : Set the audio signal to be generated. - There are 4 types of waveform. (Sine, Triangle, Squire, Saw) - It can set the value of the frequency in 20Hz - 20000Hz. 10. Generates the noise signal : Set the noise signal to be generated. - There are 2 types of noise. (White noise, pink noise) [Other] - Background color: Black, White - WaveForm: Line Color (Green, Yellow, Invert), Line Width (1.0 ~ 6.0 px) - Spectrum: Bar color (Green, Yellow, Color patterns) - Spectrogram: Colormap, Display range (-150 ~ -60 dB), Display time (4 ~ 60 sec), Apply Spectrum Tilt - Bluetooth connection policy selection (disabled, HFP, A2DP). - Scaling of Waveform / Spectrum display in the Y direction (magnification: 0.5 - 2.0). - Scaling of Spectrum / Spectrogram display in the X direction (magnification: 1.0 - 16.0).

About

STETSOM STX DSP

Control your Stetsom audio system directly from your smartphone. Adjust your automotive sound system in real-time and monitor technical information with this app. Explore features in demo mode if you don't own a compatible processor.

Highlights
  • Real-time audio system adjustment
  • Monitor technical information
  • Bluetooth communication
  • Control compatible digital processors
  • Demo mode for exploration
Features
Read full description

Full control of your Stetsom audio system directly from your smartphone! The official Stetsom app was developed to offer intuitive, precise and complete control of several of the brand's digital processors, compatible with the STX2436BT, STX2448BT and STX2496BT processors. Whether to adjust your automotive sound system in real time or to monitor technical information, with multiple functionalities, the app delivers a modern and connected experience through Bluetooth communication. How to use: 1. Install the app on your device 2. Activate Bluetooth 3. Turn on the compatible processor 4. Open the app and select the desired processor from the list If you do not yet have a compatible Stetsom processor, activate the demo mode and explore all the features available in the app. Optimize the sound, customize the experience and have full control of your Stetsom processors in the palm of your hand!

Screenshots

Audio / Spectrum Analyzer4 screens
STETSOM STX DSP4 screens

Verdict

The call

Audio / Spectrum Analyzer and STETSOM STX DSP both sit at 4.6 stars, but that hides the real split: 79% of Audio / Spectrum Analyzer's written reviews are positive against 39% of STETSOM STX DSP's. STETSOM STX DSP's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, rating, ratings volume and update cadence 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

Both are free to download. Audio / Spectrum Analyzer sells 1 one-off in-app purchase. STETSOM STX DSP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Audio / Spectrum Analyzer against 4.6 for STETSOM STX DSP. Both are backed by a comparable volume of ratings — 1.1K and 424 respectively. Written reviews are what separate them: 79% of Audio / Spectrum Analyzer's written reviews are positive against 39% of STETSOM STX DSP's.

UpkeepUpdate frequency

Audio / Spectrum Analyzer ships an update every 2 weeks, STETSOM STX DSP every 8 days. Both last shipped on October 27, 2026.

Scorecard5 real differences · 5 level
Audio / Spectrum Analyzer versus STETSOM STX DSP: the parameters behind the verdict, then further details
ParameterAudio / Spectrum AnalyzerSTETSOM STX DSP
PriceFreeFree
Rating4.6 (1.1K ratings)4.6 (424 ratings) — better
Positive reviews78.6% of reviews — better39.3% of reviews
Number of ratings1.1K — better424
Update frequencyEvery 2 weeksEvery 8 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size5 MB71 MB
Age rating4+4+
DeveloperLoop-Sessions.LLC.STETSOM ELETRÔNICA LTDA

Customer experience

Audio / Spectrum Analyzer

All ratings1,048 ratings
Positive91.2%
Neutral3.8%
Negative5.0%
Written reviews103 reviews
Positive78.6%
Neutral2.9%
Negative18.4%

STETSOM STX DSP

All ratings391 ratings
Positive90.3%
Neutral1.8%
Negative7.9%
Written reviews56 reviews
Positive39.3%
Neutral5.4%
Negative55.4%

Bugs and requests

Audio / Spectrum Analyzer

Reported bugs

3 issues
  • Stuck on latest measurement
  • White noise instead of expected functionality
  • Disconnects AirPods

Requested features

4 requests
  • Sampling rate adjustment
  • Wave shape tracking
  • Audio file analysis
  • Octave analysis

STETSOM STX DSP

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Audio / Spectrum Analyzer

One-time1
  • Pro (Remove ads, High-Res analysis)$11.99
None

STETSOM STX DSP

No in-app purchases

Questions

Is Audio / Spectrum Analyzer free?
Audio / Spectrum Analyzer is free to download, with in-app purchases available.
Is STETSOM STX DSP free?
STETSOM STX DSP is free to download, with no in-app purchases.
Which has better reviews, Audio / Spectrum Analyzer or STETSOM STX DSP?
STETSOM STX DSP is rated higher. Audio / Spectrum Analyzer averages 4.6 out of 5 from 1.1K ratings, while STETSOM STX DSP averages 4.6 from 424 ratings.
Do Audio / Spectrum Analyzer or STETSOM STX DSP have ads?
Audio / Spectrum Analyzer shows ads; STETSOM STX DSP does not.
Which is updated more often, Audio / Spectrum Analyzer or STETSOM STX DSP?
Audio / Spectrum Analyzer ships an update every 2 weeks, and STETSOM STX DSP every 8 days. Most recently, Audio / Spectrum Analyzer was updated on October 27, 2026 and STETSOM STX DSP on October 27, 2026.

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