# Lambda vs Stellar BLE

The clearest difference is price: Stellar BLE at Free against Lambda's $2.99. Stellar BLE also leads on update cadence (every 3 months vs every 54 months) and iOS requirement (12.1 vs 15.6). Lambda's advantage is rating (5.0 vs 3.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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

Lambda holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Lambda ships an update every 54 months, Stellar BLE every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Lambda | Stellar BLE |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lambda/id434581690/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/stellar-ble/id1593159566/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 75 MB |
| Requires iOS | 15.6 | **12.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dgApps](https://appshunter.io/developer/357488432) | [Shanghai Sansi Electronic Engineering Co., Ltd](https://appshunter.io/developer/965055646) |

## 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


### Stellar BLE

[App page](https://appshunter.io/ios/app/stellar-ble/id1593159566)

Wirelessly control smart lights via Bluetooth. Adjust brightness and select from millions of colors to set the perfect ambiance for any room. Effortlessly manage your lighting experience.

**Highlights:** Bluetooth Low Energy control, Turn lights on/off, Adjust brightness, Choose from millions of colors, Wireless operation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lambda free?

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

### Is Stellar BLE free?

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

### Which has better reviews, Lambda or Stellar BLE?

Lambda is rated higher. Lambda averages 5.0 out of 5 from 1 ratings, while Stellar BLE averages 3.0 from 1 ratings.

### Do Lambda or Stellar BLE have ads?

Neither Lambda nor Stellar BLE shows ads.

### Which is updated more often, Lambda or Stellar BLE?

Lambda ships an update every 54 months, and Stellar BLE every 3 months. Most recently, Lambda was updated on October 24, 2026 and Stellar BLE on October 24, 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.*