# uSpectrum PAR vs CameraKeep

The clearest difference is in-app purchases: uSpectrum PAR at none against CameraKeep's 2. uSpectrum PAR also leads on ads (none vs shown) and device support (3 vs 1). CameraKeep's advantage is update cadence (every 3 months vs every 8 months). On price there is nothing between them.

Both are free to download. CameraKeep sells 2 in-app purchases, starting at $0.99 per 7 days. uSpectrum PAR asks for nothing beyond the download.

uSpectrum PAR ships an update every 8 months, CameraKeep every 3 months. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | uSpectrum PAR | CameraKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/uspectrum-par/id1466017397/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 25 MB | 6 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [Ryo Tsudukihashi](https://appshunter.io/developer/1320583602) |

## What reviewers say

### uSpectrum PAR

[App page](https://appshunter.io/ios/app/uspectrum-par/id1466017397)

This application connects wirelessly to a handheld spectral PAR meter, allowing remote analysis and configuration of light sources. It displays detailed spectral data, light source information, and absorption metrics, with options to save and share measurements.

**Highlights:** Wireless Bluetooth connection, Remote light source analysis, Save captured data, Display spectrum and CIE diagrams, View light source metrics (LUX, CCT, CRI), Share measured data via email

**Features:** macOS Compatibility

**In-app purchases:** none


### CameraKeep

[App page](https://appshunter.io/ios/app/camerakeep-camera-gear-care/id6784186281)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Weekly) | $0.99 | per 7 days |
| Premium (Lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is uSpectrum PAR free?

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

### Is CameraKeep free?

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

### Do uSpectrum PAR or CameraKeep have ads?

CameraKeep shows ads; uSpectrum PAR does not.

### Which is updated more often, uSpectrum PAR or CameraKeep?

uSpectrum PAR ships an update every 8 months, and CameraKeep every 3 months. Most recently, uSpectrum PAR was updated on November 3, 2026 and CameraKeep on November 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*