# Light Spectrometer Wavelength vs Backdraft Control

The clearest difference is rating: Backdraft Control at 5.0 against Light Spectrometer Wavelength's 4.2. Backdraft Control also leads on in-app purchases (none vs 7) and review sentiment (100% vs 72%). Light Spectrometer Wavelength's advantage is update cadence (every 2 months vs every 9 months) and ratings volume (92 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Light Spectrometer Wavelength sells 4 in-app purchases, starting at $0.99 per month. Backdraft Control asks for nothing beyond the download.

Backdraft Control holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Light Spectrometer Wavelength has 92 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 72% of Light Spectrometer Wavelength's written reviews are positive against 100% of Backdraft Control's.

Light Spectrometer Wavelength ships an update every 2 months, Backdraft Control every 9 months. The most recent releases landed on September 22, 2026 and August 9, 2026 respectively.

## The numbers

| Metric | Light Spectrometer Wavelength | Backdraft Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (92 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/backdraft-control/id6504692991/reviews)** |
| Number of ratings | **92** | 2 |
| Positive reviews | 71.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 43 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Contechity AB](https://appshunter.io/developer/1649290454) | [Ben Pauza](https://appshunter.io/developer/1611207130) |

## What reviewers say

### Light Spectrometer Wavelength

[App page](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820)

This application analyzes light to determine its dominant wavelength in nanometers, frequency in terahertz, and period length in femtoseconds. It provides real-time measurements and allows users to save their findings with notes. The app is designed for measuring colored light sources.

**Highlights:** Measures dominant wavelength (nm), Measures frequency (THz), Measures period length (fs), Real-time measurement, Save measurements with notes, Optional calibration

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $0.99 | per month |
| Full access | $0.99 | per month |
| Full access | $4.99 | per year |
| Full access | $6.99 | one-time |


### Backdraft Control

[App page](https://appshunter.io/ios/app/backdraft-control/id6504692991)

This application provides comprehensive control over your Catalyst Wireless FCU, allowing you to fine-tune settings like dwell, delay, and fire modes. It enables firmware updates and system monitoring directly from your mobile device, offering professional-grade customization for airsoft enthusiasts.

**Highlights:** Configure dwell, delay, and fire modes, Adjust advanced parameters, Save and load custom presets, Monitor system behavior, Update FCU firmware, Intuitive user interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Light Spectrometer Wavelength free?

Light Spectrometer Wavelength is free to download, with in-app purchases available.

### Is Backdraft Control free?

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

### Which has better reviews, Light Spectrometer Wavelength or Backdraft Control?

Backdraft Control is rated higher. Light Spectrometer Wavelength averages 4.2 out of 5 from 92 ratings, while Backdraft Control averages 5.0 from 2 ratings.

### Do Light Spectrometer Wavelength or Backdraft Control have ads?

Neither Light Spectrometer Wavelength nor Backdraft Control shows ads.

### Which is updated more often, Light Spectrometer Wavelength or Backdraft Control?

Light Spectrometer Wavelength ships an update every 2 months, and Backdraft Control every 9 months. Most recently, Light Spectrometer Wavelength was updated on September 22, 2026 and Backdraft Control on August 9, 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.*