# Light Spectrometer Wavelength vs SeatChk

The clearest difference is rating: SeatChk at 5.0 against Light Spectrometer Wavelength's 4.2. SeatChk also leads on in-app purchases (none vs 7) and review sentiment (100% vs 71%). Light Spectrometer Wavelength's advantage is ratings volume (96 vs 4). 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. SeatChk asks for nothing beyond the download.

SeatChk 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 96 ratings behind it against 4, 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 100% of SeatChk's.

## The numbers

| Metric | Light Spectrometer Wavelength | SeatChk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (96 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/seatchk/id6759760542/reviews)** |
| Number of ratings | **96** | 4 |
| Positive reviews | 70.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 37 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Contechity AB](https://appshunter.io/developer/1649290454) | [JULIA DIANA NOVICK](https://appshunter.io/developer/1880515970) |

## 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 |


### SeatChk

[App page](https://appshunter.io/ios/app/seatchk/id6759760542)

Find available spots in campus buildings like libraries, gyms, and dining halls in real-time. View crowd levels, plan visits with historical data, and contribute to community reports for accurate information.

**Highlights:** Real-time campus map with heat levels, Historical busyness trends, Crowdsourced reporting, Verified accuracy through geofencing, Points and leaderboard for contributions, Anonymous usage

**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 SeatChk free?

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

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

SeatChk is rated higher. Light Spectrometer Wavelength averages 4.2 out of 5 from 96 ratings, while SeatChk averages 5.0 from 4 ratings.

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

Neither Light Spectrometer Wavelength nor SeatChk shows ads.

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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.*