# Mini Spectrometer (NIR) vs Light Spectrometer Wavelength

The clearest difference is in-app purchases: Mini Spectrometer (NIR) at none against Light Spectrometer Wavelength's 7. On price, update cadence, 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. Mini Spectrometer (NIR) asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on May 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Mini Spectrometer (NIR) | Light Spectrometer Wavelength |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (92 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews)** |
| Number of ratings | — | **92** |
| Positive reviews | — | 71.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 43 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ams AG](https://appshunter.io/developer/1077235619) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### Mini Spectrometer (NIR)

[App page](https://appshunter.io/ios/app/mini-spectrometer-nir/id1635109082)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Mini Spectrometer (NIR) free?

Mini Spectrometer (NIR) is free to download, with no in-app purchases.

### Is Light Spectrometer Wavelength free?

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

### Do Mini Spectrometer (NIR) or Light Spectrometer Wavelength have ads?

Neither Mini Spectrometer (NIR) nor Light Spectrometer Wavelength shows ads.

### Which is updated more often, Mini Spectrometer (NIR) or Light Spectrometer Wavelength?

Mini Spectrometer (NIR) ships an update every 2 months, and Light Spectrometer Wavelength every 2 months. Most recently, Mini Spectrometer (NIR) was updated on May 16, 2026 and Light Spectrometer Wavelength on September 22, 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.*