# Lambda vs Wavelength Calculator

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.

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.

## The numbers

| Metric | Lambda | Wavelength Calculator |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews)** | [2.6 (5 ratings)](https://appshunter.io/ios/app/wavelength-calculator/id1413070800/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | **80.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 30 months** |
| Monetization | Paid | Paid |
| Size | 6 MB | 1 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Lambda

[App page](https://appshunter.io/ios/app/lambda/id434581690)

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.

**Highlights:** 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

**In-app purchases:** none


### Wavelength Calculator

[App page](https://appshunter.io/ios/app/wavelength-calculator/id1413070800)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Lambda free?

Lambda costs $2.99, with no in-app purchases.

### Is Wavelength Calculator free?

Wavelength Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, Lambda or Wavelength Calculator?

Lambda is rated higher. Lambda averages 5.0 out of 5 from 1 ratings, while Wavelength Calculator averages 2.6 from 5 ratings.

### Do Lambda or Wavelength Calculator have ads?

Neither Lambda nor Wavelength Calculator shows ads.

### Which is updated more often, Lambda or Wavelength Calculator?

Lambda ships an update every 54 months, and Wavelength Calculator every 30 months. Most recently, Lambda was updated on September 17, 2026 and Wavelength Calculator on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*