# uSpectrumX vs Wavelength Optics Calculator

The clearest difference is update cadence: Wavelength Optics Calculator at monthly against uSpectrumX's every 3 months. uSpectrumX's advantage is iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

uSpectrumX ships an update every 3 months, Wavelength Optics Calculator monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | uSpectrumX | Wavelength Optics Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uspectrumx/id1318581445/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 25 MB | 30 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [WAVELENGTH OPTO-ELECTRONIC (S) PTE. LTD.](https://appshunter.io/developer/1573390066) |

## What reviewers say

### uSpectrumX

[App page](https://appshunter.io/ios/app/uspectrumx/id1318581445)

This application connects wirelessly to a handheld spectrometer to remotely analyze light sources. It displays detailed spectral data, light source information, and allows for data saving and sharing.

**Highlights:** Wireless Wi-Fi connection to spectrometer, Remote light source analysis, Spectrum, CIE1931, CIE1976, CRI, TM-30 diagrams, Detailed light source information (LUX, CCT, CRI), Save and share captured data, Open UPRTek .xls files

**Features:** macOS Compatibility

**In-app purchases:** none


### Wavelength Optics Calculator

[App page](https://appshunter.io/ios/app/wavelength-optics-calculator/id1573390064)

This utility app provides a collection of pre-built calculator formulas for common optical calculations. It's designed for quick and easy access to essential optical engineering tools.

**Highlights:** Pre-built calculator formulas, Popular optical calculations, Quick access tools, Designed for engineers, Useful for students

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is uSpectrumX free?

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

### Is Wavelength Optics Calculator free?

Wavelength Optics Calculator is free to download, with no in-app purchases.

### Do uSpectrumX or Wavelength Optics Calculator have ads?

Neither uSpectrumX nor Wavelength Optics Calculator shows ads.

### Which is updated more often, uSpectrumX or Wavelength Optics Calculator?

uSpectrumX ships an update every 3 months, and Wavelength Optics Calculator monthly. Most recently, uSpectrumX was updated on November 2, 2026 and Wavelength Optics Calculator 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.*