# Light Spectrometer Wavelength vs VSensors

The clearest difference is review sentiment: Light Spectrometer Wavelength at 71% against VSensors's 0%. Light Spectrometer Wavelength also leads on rating (4.2 vs 2.3) and update cadence (every 2 months vs every 7 months). VSensors's advantage is in-app purchases (none vs 7) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

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

Light Spectrometer Wavelength holds the better App Store score, 4.2 against 2.3. That said, the two scores are not equally well evidenced: Light Spectrometer Wavelength has 96 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 71% of Light Spectrometer Wavelength's written reviews are positive against 0% of VSensors's.

Light Spectrometer Wavelength ships an update every 2 months, VSensors every 7 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Light Spectrometer Wavelength | VSensors |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (96 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews)** | [2.3 (6 ratings)](https://appshunter.io/ios/app/vsensors/id6458102676/reviews) |
| Number of ratings | **96** | 6 |
| Positive reviews | **70.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 43 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Contechity AB](https://appshunter.io/developer/1649290454) | [ZHANGZHOU EASTERN INTELLIGENT METER CO., LTD.](https://appshunter.io/developer/1064839954) |

## 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 |


### VSensors

[App page](https://appshunter.io/ios/app/vsensors/id6458102676)

This application connects to multiple Bluetooth sensors to monitor environmental conditions like illumination, temperature, humidity, and noise. It displays data in maximum/minimum modes, line charts, and tables, with export options available. Requires Vevor Bluetooth Sensor Series and iOS 9.0 or later.

**Highlights:** Connects multiple Bluetooth sensors simultaneously, Monitors illumination, temperature, humidity, and noise, Maximum and minimum display modes, Line chart and data table views, Data export in various formats

**Features:** macOS Compatibility

**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 VSensors free?

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

### Which has better reviews, Light Spectrometer Wavelength or VSensors?

Light Spectrometer Wavelength is rated higher. Light Spectrometer Wavelength averages 4.2 out of 5 from 96 ratings, while VSensors averages 2.3 from 6 ratings.

### Do Light Spectrometer Wavelength or VSensors have ads?

Neither Light Spectrometer Wavelength nor VSensors shows ads.

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

Light Spectrometer Wavelength ships an update every 2 months, and VSensors every 7 months. Most recently, Light Spectrometer Wavelength was updated on November 3, 2026 and VSensors on November 3, 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.*