# iiziRun Custom vs uSpectrumX

The clearest difference is iOS requirement: uSpectrumX at 9.0 against iiziRun Custom's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

iiziRun Custom ships an update every 2 months, uSpectrumX every 3 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | iiziRun Custom | uSpectrumX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uspectrumx/id1318581445/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free |
| Size | 38 MB | 25 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mindus SARL](https://appshunter.io/developer/1092859449) | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) |

## What reviewers say

### iiziRun Custom

[App page](https://appshunter.io/ios/app/iizirun-custom/id1176749689)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is iiziRun Custom free?

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

### Is uSpectrumX free?

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

### Do iiziRun Custom or uSpectrumX have ads?

Neither iiziRun Custom nor uSpectrumX shows ads.

### Which is updated more often, iiziRun Custom or uSpectrumX?

iiziRun Custom ships an update every 2 months, and uSpectrumX every 3 months. Most recently, iiziRun Custom was updated on October 24, 2026 and uSpectrumX on October 21, 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.*