# uSpectrumX vs Spectrolite

The clearest difference is in-app purchases: uSpectrumX at none against Spectrolite's 1. uSpectrumX also leads on update cadence (every 3 months vs every 8 months) and iOS requirement (9.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Spectrolite sells 1 one-off in-app purchase. uSpectrumX asks for nothing beyond the download.

uSpectrumX ships an update every 3 months, Spectrolite every 8 months. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | uSpectrumX | Spectrolite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (51 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** |
| Number of ratings | — | **51** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 1 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [Waxing Wave](https://appshunter.io/developer/392942046) |

## What reviewers say

### uSpectrumX

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.

**Highlights:** Real-time spectrogram visualization, Constant-Q, linear, and mel frequency scales, Full human hearing frequency range, Intuitive touch panning and zooming, Adjustable gain, Q, and other parameters, Pro version: grids, scales, spectrum view, tap-to-measure

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


## Frequently asked questions

### Is uSpectrumX free?

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

### Is Spectrolite free?

Spectrolite is free to download, with in-app purchases available.

### Do uSpectrumX or Spectrolite have ads?

Neither uSpectrumX nor Spectrolite shows ads.

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

uSpectrumX ships an update every 3 months, and Spectrolite every 8 months. Most recently, uSpectrumX was updated on September 16, 2026 and Spectrolite on September 23, 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.*