Comparison

Audio Spectrum Analyzer dB RTA vs Oscilloscope & Spectrogram

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

Oscilloscope & Spectrogram

Analyze audio in real-time with detailed oscilloscope and spectrogram views. Pause, scroll, and zoom to precisely identify frequencies, notes, and sound events. Offers advanced triggering and a unique Bark-frequency scale for detailed analysis.

Highlights
  • Real-time oscilloscope and spectrogram
  • Pause and scroll audio history
  • Pinch-to-zoom functionality
  • Frequency and MIDI note identification
  • Stereo and mono views
  • Trigger with lookahead
Features
Currently charting
Read full description

OSCILLOSCOPE & SPECTROGRAM is a powerful audio analyzer app and audio unit plugin KEY FEATURES - Run as both Audio Unit and standalone app - View up to three seconds of audio on the screen - Pause and scroll horizontally to browse back in time - Pinch to zoom in / zoom out - See both oscilloscope and spectrogram separately or overlayed together - Frequency trigger mode helps identify the precise frequency and MIDI note of sounds in the spectrogram - Stereo and mono views - Level based trigger mode has lookahead, pause, and zoom - XY mode shows stereo correlation - Automatically adjusts FFT size to fit zoom setting - Bark-frequency scale spectrogram shows nice detail at low and high frequencies - When zoomed in, the oscilloscope uses sinc upsampling to show you a close approximation of what actually outputs from your audio interface after digital to analog conversion, rather than just displaying raw audio samples. WHAT DOES THIS APP DO THAT OTHERS DO NOT? 1. Pause Button We can't emphasize enough how useful this is. You never have to worry about trying to catch short events that disappear quickly because you can watch the sounds go by slowly at a 3 second viewer scale, then just pause and scroll back if you missed something. When you get to the event you want to see you can pinch to zoom in right down to sub-sample level of detail, then zoom back out when you are done and zoom in on something else. This feature alone makes almost all other oscilloscope apps unnecessary because it means you can easily see ANYTHING that you need to see. 2. Frequency Identification Mode In frequency mode, when you touch the frequency scale on the right of the screen a blue line appears on the spectrogram. When you position the line above a specific frequency on the spectrogram, a panel on the left side of the screen displays the octave, note name, and MIDI number. You can then use the frequency timing oscilloscope to lock in on the exact pitch in cents so that you not only know which MIDI note that sound corresponds to but you know exactly how many cents sharp or flat. The ability to simultaneously see the frequency on the spectrogram and confirm it with precision on the oscilloscope allows you to quickly and easily identify musical pitches to a level of accuracy that have not seen anywhere else, not even in desktop software. 3. Trigger with Lookahead Almost every oscilloscope has a feature where it re-draws the screen each time the input signal level crosses a specified threshold. This is the main and most basic function of any oscilloscope. However, when setting the trigger at a high level to view the attack section of musical notes or drums, we miss the first part of the note. By using lookahead, this app allows you to see a few milliseconds BEFORE the trigger point so that you can see the whole sound you want to examine. 4. Carefully Designed Spectrogram In all spectrum analyzer displays, the upper end of the frequency scale is crowded, meaning that a single pixel corresponds to 10 or 20 frequencies in the frequency analysis. In many other analyzer apps one of two things occur: either 9 out of 10 frequencies in that upper range simply get ignored and disappear from the spectrogram display, or all 10 frequencies combine together to make the pixels in the upper range appear brighter than low frequency sounds of similar volume. This may seem like a technicality until you run a sine sweep or a 20 KHz tone through the analyzer and find that large sections of the input simply aren't displayed on the analyzer screen. Looking at these kinds of test signals on a spectrogram is the primary way that we test and evaluate the quality of audio effect plugins. If a spectrogram is to be of any real use as an analysis tool, it should do this right. Other spectrograms often mess up the lower frequencies too, either by making them take up too much space or by making them very pixelated. This spectrogram carefully avoids these problems.

Screenshots

Audio Spectrum Analyzer dB RTA3 screens
Oscilloscope & Spectrogram4 screens

Verdict

The call

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against Oscilloscope & Spectrogram's $5.99. Audio Spectrum Analyzer dB RTA also leads on ratings volume (3K vs 28). Oscilloscope & Spectrogram's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs every 5 months). On rating, 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; Oscilloscope & Spectrogram costs $5.99 up front. Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. Oscilloscope & Spectrogram asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Audio Spectrum Analyzer dB RTA against 4.6 for Oscilloscope & Spectrogram. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K ratings behind it against 28, so its average is the more settled of the two. Written reviews are what separate them: 44% of Audio Spectrum Analyzer dB RTA's written reviews are positive against 70% of Oscilloscope & Spectrogram's.

UpkeepUpdate frequency

Audio Spectrum Analyzer dB RTA ships an update every 5 months, Oscilloscope & Spectrogram every 4 days. The most recent releases landed on September 22, 2026 and September 17, 2026 respectively.

Scorecard8 real differences · 3 level
Audio Spectrum Analyzer dB RTA versus Oscilloscope & Spectrogram: the parameters behind the verdict, then further details
ParameterAudio Spectrum Analyzer dB RTAOscilloscope & Spectrogram
PriceFree — better$5.99
Rating4.5 (3K ratings)4.6 (28 ratings) — better
Positive reviews43.6% of reviews70.0% of reviews — better
Number of ratings3K — better28
Update frequencyEvery 5 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#199 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS1512.0 — better
Further details — not scored
Size24 MB3 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%

Oscilloscope & Spectrogram

All ratings28 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews10 reviews
Positive70.0%
Neutral0.0%
Negative30.0%

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

Oscilloscope & Spectrogram

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

Oscilloscope & Spectrogram

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 Oscilloscope & Spectrogram free?
Oscilloscope & Spectrogram costs $5.99, with no in-app purchases.
Which has better reviews, Audio Spectrum Analyzer dB RTA or Oscilloscope & Spectrogram?
Oscilloscope & Spectrogram is rated higher. Audio Spectrum Analyzer dB RTA averages 4.5 out of 5 from 3K ratings, while Oscilloscope & Spectrogram averages 4.6 from 28 ratings.
Do Audio Spectrum Analyzer dB RTA or Oscilloscope & Spectrogram have ads?
Neither Audio Spectrum Analyzer dB RTA nor Oscilloscope & Spectrogram shows ads.
Which is updated more often, Audio Spectrum Analyzer dB RTA or Oscilloscope & Spectrogram?
Audio Spectrum Analyzer dB RTA ships an update every 5 months, and Oscilloscope & Spectrogram every 4 days. Most recently, Audio Spectrum Analyzer dB RTA was updated on September 22, 2026 and Oscilloscope & Spectrogram on September 17, 2026.

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