# Lambda vs WaveCalc

The clearest difference is price: WaveCalc at Free against Lambda's $2.99. WaveCalc also leads on update cadence (every 2 months vs every 54 months) and iOS requirement (13 vs 15.6). Lambda's advantage is in-app purchases (none vs 4). On rating, ratings volume, ads and device support there is nothing between them.

WaveCalc is free to download; Lambda costs $2.99 up front. WaveCalc sells 4 one-off in-app purchases. Lambda asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Lambda against 5.0 for WaveCalc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Lambda ships an update every 54 months, WaveCalc every 2 months. The most recent releases landed on October 4, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Lambda | WaveCalc |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/wavecalc-sound-calculator/id1554658517/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 3 MB |
| Requires iOS | 15.6 | **13** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [Valerie Gard](https://appshunter.io/developer/1554658519) |

## 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


### WaveCalc

[App page](https://appshunter.io/ios/app/wavecalc-sound-calculator/id1554658517)

This utility app assists audio professionals with complex sound calculations. It helps determine parameters like delay, wavelength, and SPL drop for various audio applications.

**Highlights:** Delay calculation, Wavelength calculation, SPL drop calculation, Sound propagation parameters, Audio professional tools

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $3.99 | one-time |
| Tip | $6.99 | one-time |
| Tip | $17.99 | one-time |
| Unlock Pro | $19.99 | one-time |


## Frequently asked questions

### Is Lambda free?

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

### Is WaveCalc free?

WaveCalc is free to download, with in-app purchases available.

### Which has better reviews, Lambda or WaveCalc?

Lambda and WaveCalc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Lambda or WaveCalc have ads?

Neither Lambda nor WaveCalc shows ads.

### Which is updated more often, Lambda or WaveCalc?

Lambda ships an update every 54 months, and WaveCalc every 2 months. Most recently, Lambda was updated on October 4, 2026 and WaveCalc on September 20, 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.*