# Spectrum vs KKM UWB

The clearest difference is price: KKM UWB at Free against Spectrum's $5.99. KKM UWB also leads on in-app purchases (none vs 1). Spectrum's advantage is update cadence (every 2 weeks vs every 5 weeks) and device support (3 vs 1). On ads and iOS requirement there is nothing between them.

KKM UWB is free to download; Spectrum costs $5.99 up front. Spectrum sells 1 one-off in-app purchase. KKM UWB asks for nothing beyond the download.

Spectrum ships an update every 2 weeks, KKM UWB every 5 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Spectrum | KKM UWB |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Size | 10 MB | 5 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Victor Serov](https://appshunter.io/developer/1635616731) | [KKM Co.,Ltd.](https://appshunter.io/developer/1009170317) |

## What reviewers say

### Spectrum

[App page](https://appshunter.io/ios/app/spectrum-v-audio-analyzer/id6450556284)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version | $0.99 | one-time |


### KKM UWB

[App page](https://appshunter.io/ios/app/kkm-uwb/id6475756984)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spectrum free?

Spectrum costs $5.99, and also offers in-app purchases.

### Is KKM UWB free?

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

### Do Spectrum or KKM UWB have ads?

Neither Spectrum nor KKM UWB shows ads.

### Which is updated more often, Spectrum or KKM UWB?

Spectrum ships an update every 2 weeks, and KKM UWB every 5 weeks. Most recently, Spectrum was updated on October 27, 2026 and KKM UWB on October 24, 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.*