# Lambda vs Fabisense

The clearest difference is price: Fabisense at Free against Lambda's $2.99. Fabisense also leads on update cadence (fortnightly vs every 54 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Fabisense is free to download; Lambda costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lambda ships an update every 54 months, Fabisense fortnightly. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Lambda | Fabisense |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 6 MB | 25 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [Protech International Group Co., Ltd](https://appshunter.io/developer/1802818430) |

## 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


### Fabisense

[App page](https://appshunter.io/ios/app/fabisense/id6743430830)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lambda free?

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

### Is Fabisense free?

Fabisense is free to download, with no in-app purchases.

### Do Lambda or Fabisense have ads?

Neither Lambda nor Fabisense shows ads.

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

Lambda ships an update every 54 months, and Fabisense fortnightly. Most recently, Lambda was updated on October 4, 2026 and Fabisense on September 30, 2026.

---

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