# PimaSpec vs Light Spectrometer Wavelength

The clearest difference is in-app purchases: PimaSpec at none against Light Spectrometer Wavelength's 7. PimaSpec also leads on update cadence (every 2 weeks vs every 2 months) 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. PimaSpec asks for nothing beyond the download.

PimaSpec ships an update every 2 weeks, Light Spectrometer Wavelength every 2 months. Both last shipped on October 13, 2026.

## The numbers

| Metric | PimaSpec | Light Spectrometer Wavelength |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (94 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews)** |
| Number of ratings | — | **94** |
| Positive reviews | — | 72.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 43 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PimaSens Inc.](https://appshunter.io/developer/1679893634) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### PimaSpec

[App page](https://appshunter.io/ios/app/pimaspec/id6446971144)

**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 PimaSpec free?

PimaSpec 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 PimaSpec or Light Spectrometer Wavelength have ads?

Neither PimaSpec nor Light Spectrometer Wavelength shows ads.

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

PimaSpec ships an update every 2 weeks, and Light Spectrometer Wavelength every 2 months. Most recently, PimaSpec was updated on October 13, 2026 and Light Spectrometer Wavelength on October 13, 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.*