# uSpectrumX vs flameeye

The clearest difference is update cadence: flameeye at every 3 weeks against uSpectrumX's every 3 months. uSpectrumX's advantage is iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and device support 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, flameeye every 3 weeks. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | uSpectrumX | flameeye |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flameeye/id6475804749/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 25 MB | 38 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [盗火者光电(杭州)有限公司](https://appshunter.io/developer/1725248359) |

## What reviewers say

### uSpectrumX

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

**Features:** macOS Compatibility

**In-app purchases:** none


### flameeye

[App page](https://appshunter.io/ios/app/flameeye/id6475804749)

This app offers advanced spectral analysis for substance detection within the 340-1070nm range. It provides scientific services in diverse environments where traditional spectrometers are impractical, with continuously updated modules via cloud services.

**Highlights:** Spectral analysis 340-1070nm, Substance detection, Cloud-based module updates, Portable scientific services, Works in diverse conditions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is uSpectrumX free?

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

### Is flameeye free?

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

### Do uSpectrumX or flameeye have ads?

Neither uSpectrumX nor flameeye shows ads.

### Which is updated more often, uSpectrumX or flameeye?

uSpectrumX ships an update every 3 months, and flameeye every 3 weeks. Most recently, uSpectrumX was updated on September 16, 2026 and flameeye on June 1, 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.*