# Lambda vs Sonic Pitch Sound Generator

The clearest difference is price: Sonic Pitch Sound Generator at Free against Lambda's $2.99. Sonic Pitch Sound Generator also leads on update cadence (every 5 weeks vs every 54 months) and ratings volume (1.8K vs 1). Lambda's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 2). On device support and iOS requirement there is nothing between them.

Sonic Pitch Sound Generator is free to download; Lambda costs $2.99 up front. Sonic Pitch Sound Generator sells 2 in-app purchases, starting at $5.99 per 7 days. Lambda asks for nothing beyond the download.

Lambda holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sonic Pitch Sound Generator has 1.8K 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 71% of Sonic Pitch Sound Generator's.

Lambda ships an update every 54 months, Sonic Pitch Sound Generator every 5 weeks. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Lambda | Sonic Pitch Sound Generator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews)** | [4.5 (1.8K ratings)](https://appshunter.io/ios/app/sonic-pitch-sound-generator/id1187701748/reviews) |
| Number of ratings | 1 | **1.8K** |
| Positive reviews | **80.0% of reviews** | 71.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 54 months | **Every 5 weeks** |
| Monetization | **Paid** | Subscription |
| Size | 6 MB | 28 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [茂利 王](https://appshunter.io/developer/1155900880) |

## 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


### Sonic Pitch Sound Generator

[App page](https://appshunter.io/ios/app/sonic-pitch-sound-generator/id1187701748)

Generate precise sound waves with adjustable frequencies and various waveform types. Use it for audio testing, insect repulsion, pet training, or as a prank tool. Features include a decibel meter and stereo sound tests.

**Highlights:** Adjustable sine, square, triangle, and sawtooth waveforms, Precise frequency control from 0Hz to 25kHz, Wave visualization, Insect and mosquito repellent tones, Dog whistle functionality, Stereo and bass sound tests, Real-time decibel meter

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Subscription | $5.99 | per 7 days |
| Premium Yearly Subscription | $19.99 | per year |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Precise tone generation
- 💡 Useful for testing audio equipment
- 💡 Helpful for tinnitus sufferers
- 💡 Effective for repelling mosquitoes and annoying people

**What reviewers complain about**

- 🐛 Sensitive slider makes it difficult to dial in precise frequencies
- 🔍 Lack of instructions on which frequencies to use for specific purposes
- 📢 Intrusive and frequent ads
- 🔋 Ads can cause app crashes and drain battery
- 🚫 Limited free functionality, requires payment to remove ads

**Reported bugs**

- Slider is too sensitive, making it hard to select precise frequencies
- Ads sometimes play loudly and unexpectedly, potentially damaging speakers
- App crashes when trying to close full-screen ads

**Requested features**

- Ability to save and name custom frequency presets
- Option to manually enter exact frequency values
- Timer or background playback mode
- Paid ad-free version


## Frequently asked questions

### Is Lambda free?

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

### Is Sonic Pitch Sound Generator free?

Sonic Pitch Sound Generator is free to download, with in-app purchases available.

### Which has better reviews, Lambda or Sonic Pitch Sound Generator?

Lambda is rated higher. Lambda averages 5.0 out of 5 from 1 ratings, while Sonic Pitch Sound Generator averages 4.5 from 1.8K ratings.

### Do Lambda or Sonic Pitch Sound Generator have ads?

Sonic Pitch Sound Generator shows ads; Lambda does not.

### Which is updated more often, Lambda or Sonic Pitch Sound Generator?

Lambda ships an update every 54 months, and Sonic Pitch Sound Generator every 5 weeks. Most recently, Lambda was updated on September 17, 2026 and Sonic Pitch Sound Generator 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.*