# Lambda vs Frequency

The clearest difference is review sentiment: Lambda at 80% against Frequency's 0%. Lambda also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 10). Frequency's advantage is price (Free vs $2.99) and update cadence (every 10 days vs every 54 months). On ads, device support and iOS requirement there is nothing between them.

Frequency is free to download; Lambda costs $2.99 up front. Frequency sells 9 in-app purchases, starting at $7.99 per 7 days. Lambda asks for nothing beyond the download.

Lambda holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Frequency has 24 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 Frequency's.

Lambda ships an update every 54 months, Frequency every 10 days. The most recent releases landed on September 17, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Lambda | Frequency |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews)** | [3.9 (24 ratings)](https://appshunter.io/ios/app/frequency-hz-tone-generator/id1671426872/reviews) |
| Number of ratings | 1 | **24** |
| Positive reviews | **80.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 10 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 16 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [Optimize IT](https://appshunter.io/developer/1671426874) |

## 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

[App page](https://appshunter.io/ios/app/frequency-hz-tone-generator/id1671426872)

Generate precise audio frequencies for various purposes, from tuning instruments to cleaning water from speakers. Explore different waveforms and customize sound generation for unique audio experiences. Elevate your audio quality and functionality.

**Highlights:** Generate frequencies from 1 Hz to 40,000 Hz, Clean water/moisture from speakers, Produce sine, triangle, sawtooth, and square waveforms, Tune musical instruments, Select notes and octaves for specific pitches, Play multiple frequencies simultaneously

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $7.99 | per 7 days |
| Weekly | $9.99 | per 7 days |
| Weekly VIP | $9.99 | per 7 days |
| Monthly Premium | $17.99 | per month |
| Monthly | $19.99 | per month |
| Annual VIP | $24.99 | per year |
| Annual Premium | $24.99 | per year |
| Annual VIP | $29.99 | per year |
| Annual | $29.99 | per year |


## Frequently asked questions

### Is Lambda free?

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

### Is Frequency free?

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

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

Lambda is rated higher. Lambda averages 5.0 out of 5 from 1 ratings, while Frequency averages 3.9 from 24 ratings.

### Do Lambda or Frequency have ads?

Neither Lambda nor Frequency shows ads.

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

Lambda ships an update every 54 months, and Frequency every 10 days. Most recently, Lambda was updated on September 17, 2026 and Frequency on September 7, 2026.

---

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