Lambda vs Wavelength Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lambda
This app helps musicians and sound engineers convert between musical notes, frequencies, and wavelengths. It features a dynamic fader, built-in oscillator, and frequency tracker with waveform display. Customize tuning standards and speed of sound for precise audio analysis.
- Convert notes, frequencies, wavelengths
- Dynamic fader for real-time adjustment
- Built-in oscillator with waveform
- Frequency tracker with waveform
- Customizable tuning standards
- Adjustable speed of sound
- Share data via standard methods
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Musicians and Sound Engineers. Musical Notes and Frequencies and Wavelengths. Now there's an app from dgApps to convert between them all. The app features a sliding fader to dynamically change frequency, wavelength and musical note, with locks to step through standard third octave frequencies or whole musical notes. There's a built in oscillator so you can hear the frequency, and a frequency tracker so the app can tell you the frequency. Both the oscillator and the frequency tracker display the audio waveform. A settings section allows for different tuning standards, and variations in the speed of sound. Lambda can also receive calculated Speed of Sound in Air values from another dgApps app, Cair. Lambda is now a universal app, equally at home on an iPhone as on an iPad. In Split Mode on an iPad device, side by side with Cair, the calculated Speed of Sound in Air is passed in real time to the Lambda app. Lambda allows you to share frequency/wavelength/note data via all the usual sharing methods.
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.
- Instant calculations
- Copyable results
- Included formulas
- High precision (16 decimal places)
- Multiple unit support
- Ad-free and private
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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.
Screenshots
Verdict
The clearest difference is review sentiment: Lambda at 80% against Wavelength Calculator's 0%. Lambda also leads on rating (5.0 vs 2.6). Wavelength Calculator's advantage is ratings volume (5 vs 1) and iOS requirement (13 vs 15.6). On price, update cadence, 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
Lambda costs $2.99 and Wavelength Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Lambda holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Wavelength Calculator has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 80% of Lambda's written reviews are positive against 0% of Wavelength Calculator's.
Lambda ships an update every 54 months, Wavelength Calculator every 30 months. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.
| Parameter | Lambda | Wavelength Calculator |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 5.0 (1 ratings) — better | 2.6 (5 ratings) |
| Positive reviews | 80.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 54 months | Every 30 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13 — better |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | dgApps | Nitrio |
Customer experience
Lambda
Wavelength Calculator
In-app purchases
Lambda
No in-app purchases
Wavelength Calculator
No in-app purchases
Questions
Is Lambda free?
Is Wavelength Calculator free?
Which has better reviews, Lambda or Wavelength Calculator?
Do Lambda or Wavelength Calculator have ads?
Which is updated more often, Lambda or Wavelength Calculator?
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