Comparison

Audio Spectrum Analyzer dB RTA vs WebSDR

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 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

About

WebSDR

This Audio Unit plugin allows musicians to incorporate live radio broadcasts into their music. It accesses Software Defined Radio streams from servers worldwide, offering unique audio textures for performances and mixes.

Highlights
  • Plays Software Defined Radio streams
  • Integrates live radio audio into music
  • Accesses global radio servers
  • Supports various radio modes (LSB, USB, CW, AM, FM)
  • Provides unique audio textures for mixes
Features
Read full description

WebSDR is an Audio Unit Plugin that plays audio from Software Defined Radio (SDR) streams. It allows you to incorporate the sound of live radio into a live music performance. WHAT IS SOFTWARE DEFINED RADIO? A software defined radio is a device with an antenna that connects to a computer and allows it to receive live radio broadcasts. It features a wide variety of protocols; in addition to standard AM and FM modes found in most consumer radios it typically includes modes for LSB, USB, CW and other settings used to listen in on the CB radios used by taxi drives, marine weather stations, air traffic control towers, amateur radio enthusiasts and many other types of radio broadcasts. The signals you can access using this app are not your own local radio stations; rather they are the radio stations in the vicinity of a collection of free servers, many of them operated by universities. These servers are positioned in many different countries around the world so using this plugin you can listen in on a variety of radio signals in a wide variety of languages and cultures. WHAT DO PEOPLE USE THIS PLUGIN FOR? The crackly sound of an old-style AM broadcast or a conversation between taxi drivers on a CB radio is a musical flavour that can not be replicated with other plugins. If you are looking for some really unique and interesting material to include in your performances or mixes, this plugin will supply. LIMITATIONS This plugin requires Javascript in order to play sound. Unfortunately that means that the UI must be open the entire time you are using it. When the UI is closed Javascript stops running, similar to the way a website stops playing audio when you close a tab in your browser. NOTE: THIS IS AN AUDIO UNIT PLUGIN. IT RUNS INSIDE A HOST APP SUCH AS GarageBand.

Screenshots

Audio Spectrum Analyzer dB RTA3 screens
WebSDR3 screens

Verdict

The call

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against WebSDR's $5.99. Audio Spectrum Analyzer dB RTA also leads on rating (4.5 vs 2.4) and ratings volume (3K vs 27). WebSDR's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement 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; WebSDR costs $5.99 up front. Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. WebSDR asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Audio Spectrum Analyzer dB RTA holds the better App Store score, 4.5 against 2.4. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 44% of Audio Spectrum Analyzer dB RTA's written reviews are positive against 21% of WebSDR's.

UpkeepUpdate frequency

Audio Spectrum Analyzer dB RTA ships an update every 5 months, WebSDR every 11 months. Both last shipped on November 3, 2026.

Scorecard7 real differences · 3 level
Audio Spectrum Analyzer dB RTA versus WebSDR: the parameters behind the verdict, then further details
ParameterAudio Spectrum Analyzer dB RTAWebSDR
PriceFree — better$5.99
Rating4.5 (3K ratings) — better2.4 (27 ratings)
Positive reviews43.6% of reviews — better20.6% of reviews
Number of ratings3K — better27
Update frequencyEvery 5 months — betterEvery 11 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS1514.5 — better
Further details — not scored
Size24 MB20 MB
Age rating4+4+
DeveloperMarina PolyanskayaBlue Mangoo Consulting Company Limited

Customer experience

Audio Spectrum Analyzer dB RTA

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

WebSDR

All ratings27 ratings
Positive33.3%
Neutral7.4%
Negative59.3%
Written reviews34 reviews
Positive20.6%
Neutral5.9%
Negative73.5%

Bugs and 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

WebSDR

Not enough reviews yet to summarise bugs or requests.

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
None

WebSDR

No in-app purchases

Questions

Is Audio Spectrum Analyzer dB RTA free?
Audio Spectrum Analyzer dB RTA is free to download, with in-app purchases available.
Is WebSDR free?
WebSDR costs $5.99, with no in-app purchases.
Which has better reviews, Audio Spectrum Analyzer dB RTA or WebSDR?
Audio Spectrum Analyzer dB RTA is rated higher. Audio Spectrum Analyzer dB RTA averages 4.5 out of 5 from 3K ratings, while WebSDR averages 2.4 from 27 ratings.
Do Audio Spectrum Analyzer dB RTA or WebSDR have ads?
Neither Audio Spectrum Analyzer dB RTA nor WebSDR shows ads.
Which is updated more often, Audio Spectrum Analyzer dB RTA or WebSDR?
Audio Spectrum Analyzer dB RTA ships an update every 5 months, and WebSDR every 11 months. Most recently, Audio Spectrum Analyzer dB RTA was updated on November 3, 2026 and WebSDR on November 3, 2026.

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