Comparison

Wavelength Calculator vs Wavelet Voice Sonogram

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

Head to head
About

Wavelength Calculator

This physics and math tool quickly calculates wave properties like wavelength and frequency. It supports various units, high precision, and allows results to be copied to other applications. The app is lightweight, ad-free, and designed with privacy in mind.

Highlights
  • Instant calculations
  • Copyable results
  • Included formulas
  • High precision (16 decimal places)
  • Multiple unit support
  • Ad-free and private
Features
Read full description

Wavelength Calculator is a physics/math calculator to find wavelength and frequency fast and easy. Features: - Instant calculation. - Results are copyable to other apps. - Formulas are included as reference. - Supports up to 16 decimal places. - Supports various units for each input. - Works seamlessly on both iPhone and iPad. - Lightweight, compact app optimized for everyday use. - Ad-free and built with privacy in mind. There are three main properties of a wave: velocity, wavelength, and frequency. [v] Wave velocity is the measure of how fast a wave propagates in a given medium. Its unit is meters per second. [λ] Wavelength is the distance over which the shape of the wave repeats. It depends on the medium through which the wave travels. [f] Frequency of a wave refers to how many times (per a given time period) the particles of a medium vibrate when the wave is passing through it. The unit of frequency is Hertz, or 1/second. Wavelength Formula: f = v/λ ​ Where: λ (Lambda) = Wavelength in meters v = Wave velocity f = Frequency (Hz) Thanks for your support, and do visit nitrio.com for more apps for your iOS devices.

About

Wavelet Voice Sonogram

Read full description

"Wavelet Voice Sonogram" is a sound spectrogram app that performs time-frequency analysis of acoustic signals. A spectrogram is a graph displaying the results of a sound frequency spectrum analysis, with time on the horizontal axis, frequency on the vertical axis, and signal strength represented by colors. This app can perform acoustic analysis and display the spectrograms by using three time-frequency analysis methods, Wavelet analysis, Octave Band analysis, and FFT analysis. It can also record sounds from iPhone's built-in microphone. While playing back a recording, you can search for the desired sound and analyze it. "Wavelet Voice Sonogram" makes it easy to analyze the acoustics of speech, instrumental sounds, noise, and more. It can also be used to learn the basics of speech analysis. Features: - Acoustic analysis can be performed using PCM data recorded with the iPhone's built-in microphone. It is possible to analyze 5 seconds of sound data backward from a user-specified point in time. - Three types of acoustic analysis, FFT analysis, octave band analysis and wavelet analysis, can be performed simultaneously. - PCM sound recording and playback is possible up to about 180 seconds, and the audio waveform graph and FFT analysis graph are displayed. While playing back sound, you can search for sound at any point in time. - Zoom in on a specific 10 seconds of PCM data and play back the sound. Used to find a specific sound at the point in time you want to analyze. - The spectrogram analysis result and time axis waveform can be contrasted and played back. Specifications: - Sampling frequency: 48 kHz - PCM recording time: approx. 180 seconds max. - Sound zoom function (10-Sec): Zooms in on any 10 seconds of PCM data and plays back the sound. - 3 types of acoustic analysis function (Analysis): About 5 seconds (Analysis points can be specified using the Time position slider.) -- FFT analysis (FFT): FFT 2048 points -- Octave band analysis (OCT): 1/48 octave band -- Wavelet analysis (DWT): Gabor Wavelet - Sound recording and playback, sound waveform and FFT graph display (Main): PCM graph, 10sec zoom graph, FFT graph. - Time position slider: Points to the cursor position on PCM graph. - Spectrogram display (FFT / OCT / DWT): 5 sec PCM graph and spectrogram analysis graph (vertical axis - time [0 - 5.0 sec], horizontal axis - frequency [100Hz - 8kHz]) - Snapshot (Snap): Save the analysis image in "Photos". Notes: - The acoustic analysis time varies significantly depending on the performance of your iPhone (product generation). It may take about 5 to 20 seconds. - Wireless (Bluetooth) headphones and headsets are not supported. - The first time the app accesses the built-in microphone and Photos after installation, the iOS system will ask you for permission to access them. If you have not enabled this setting, the application will not be able to access them due to iOS system privacy restrictions. Please enable the access permission in the iOS setting "Settings > Privacy & Security > Photos or Microphone". Please visit our iOS app support page for more information on this app.

Screenshots

Wavelength Calculator4 screens
Wavelet Voice Sonogram4 screens

Verdict

The call

The clearest difference is update cadence: Wavelet Voice Sonogram at every 8 months against Wavelength Calculator's every 30 months. Wavelength Calculator's advantage is price ($2.99 vs $6.99) and device support (3 vs 1). On ads and in-app purchases 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

Wavelength Calculator costs $2.99 and Wavelet Voice Sonogram $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Wavelength Calculator ships an update every 30 months, Wavelet Voice Sonogram every 8 months. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
Wavelength Calculator versus Wavelet Voice Sonogram: the parameters behind the verdict, then further details
ParameterWavelength CalculatorWavelet Voice Sonogram
Price$2.99 — better$6.99
Rating2.6 (5 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 30 monthsEvery 8 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13 — better26.2
Further details — not scored
Size1 MB0 MB
Age rating4+4+
DeveloperNitrioTOON,LLC

In-app purchases

None

Wavelength Calculator

No in-app purchases

None

Wavelet Voice Sonogram

No in-app purchases

Questions

Is Wavelength Calculator free?
Wavelength Calculator costs $2.99, with no in-app purchases.
Is Wavelet Voice Sonogram free?
Wavelet Voice Sonogram costs $6.99, with no in-app purchases.
Do Wavelength Calculator or Wavelet Voice Sonogram have ads?
Neither Wavelength Calculator nor Wavelet Voice Sonogram shows ads.
Which is updated more often, Wavelength Calculator or Wavelet Voice Sonogram?
Wavelength Calculator ships an update every 30 months, and Wavelet Voice Sonogram every 8 months. Most recently, Wavelength Calculator was updated on October 8, 2026 and Wavelet Voice Sonogram on October 25, 2026.

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