# uSpectrumX vs VVMS

The clearest difference is iOS requirement: uSpectrumX at 9.0 against VVMS's 13.0. 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.

uSpectrumX ships an update every 3 months, VVMS every 5 weeks. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | uSpectrumX | VVMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Size | 25 MB | 148 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [杰 姜](https://appshunter.io/developer/1463465833) |

## What reviewers say

### uSpectrumX

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

**Features:** macOS Compatibility

**In-app purchases:** none


### VVMS

[App page](https://appshunter.io/ios/app/vvms/id1592788469)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is uSpectrumX free?

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

### Is VVMS free?

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

### Do uSpectrumX or VVMS have ads?

Neither uSpectrumX nor VVMS shows ads.

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

uSpectrumX ships an update every 3 months, and VVMS every 5 weeks. Most recently, uSpectrumX was updated on October 4, 2026 and VVMS on October 7, 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.*