# Lambda vs Frequency Sound Generator App

The clearest difference is price: Frequency Sound Generator App at Free against Lambda's $2.99. Frequency Sound Generator App also leads on update cadence (every 2 months vs every 54 months) and ratings volume (4.8K 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.

Frequency Sound Generator App is free to download; Lambda costs $2.99 up front. Frequency Sound Generator App 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: Frequency Sound Generator App has 4.8K 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 66% of Frequency Sound Generator App's.

Lambda ships an update every 54 months, Frequency Sound Generator App every 2 months. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Lambda | Frequency Sound Generator App |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews)** | [4.5 (4.8K ratings)](https://appshunter.io/ios/app/frequency-sound-generator-app/id1238160553/reviews) |
| Number of ratings | 1 | **4.8K** |
| Positive reviews | **80.0% of reviews** | 66.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 54 months | **Every 2 months** |
| Monetization | **Paid** | Subscription |
| Size | 6 MB | 36 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [Min Ku](https://appshunter.io/developer/1204192873) |

## 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


### Frequency Sound Generator App

[App page](https://appshunter.io/ios/app/frequency-sound-generator-app/id1238160553)

Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.

**Highlights:** Frequency range 1Hz to 25,000Hz, Wave visualization, Adjustable sensitivity, Multiple waveforms (Sine, Square, Sawtooth, Triangle), Custom frequency range, Logarithmic and Linear slider modes

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access Weekly Plan | $5.99 | per 7 days |
| Unlimited Access Yearly Plan | $19.99 | per year |

**What reviewers like**

- 👍 Helpful for tinnitus
- 🚀 Accurate frequency generation
- 🎉 Great for meditation and relaxation
- 💡 Useful for testing speaker systems
- 🔍 Ability to test hearing range

**What reviewers complain about**

- 🐛 Difficulty adjusting precise frequencies
- 🔊 Extremely high frequencies can be painful
- 🔋 Stops playing when screen is locked
- 📢 Excessive ads
- 🤔 Mosquito repellent feature not effective

**Reported bugs**

- Frequency slider is overly sensitive
- Displayed frequency doesn't match actual output
- Inconsistent behavior between 'Play' and 'Mode' buttons

**Requested features**

- Option to save favorite frequencies
- Ability to type in specific frequency values
- Background playback support
- Paid ad-free version


## Frequently asked questions

### Is Lambda free?

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

### Is Frequency Sound Generator App free?

Frequency Sound Generator App is free to download, with in-app purchases available.

### Which has better reviews, Lambda or Frequency Sound Generator App?

Lambda is rated higher. Lambda averages 5.0 out of 5 from 1 ratings, while Frequency Sound Generator App averages 4.5 from 4.8K ratings.

### Do Lambda or Frequency Sound Generator App have ads?

Frequency Sound Generator App shows ads; Lambda does not.

### Which is updated more often, Lambda or Frequency Sound Generator App?

Lambda ships an update every 54 months, and Frequency Sound Generator App every 2 months. Most recently, Lambda was updated on September 17, 2026 and Frequency Sound Generator App on September 24, 2026.

---

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