# SecurityKeys vs kelvin light scale

The clearest difference is in-app purchases: SecurityKeys at none against kelvin light scale's 4. SecurityKeys also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. kelvin light scale sells 4 in-app purchases, starting at $1.49 per 7 days. SecurityKeys asks for nothing beyond the download.

## The numbers

| Metric | SecurityKeys | kelvin light scale |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/kelvin-light-scale/id6761167793/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 17 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [圣财 卢](https://appshunter.io/developer/1803211672) | [Asaru Labs LTD](https://appshunter.io/developer/1810982779) |

## What reviewers say

### SecurityKeys

[App page](https://appshunter.io/ios/app/securitykeys/id6747809012)

**Features:** macOS Compatibility

**In-app purchases:** none


### kelvin light scale

[App page](https://appshunter.io/ios/app/kelvin-light-scale/id6761167793)

This tool transforms your iPhone into a light meter, lux meter, and color temperature analyzer. It provides instant readings for color temperature, light intensity, and exposure values, offering real-time guidance for photography, videography, and lighting setups.

**Highlights:** Instant color temperature (Kelvin) measurement, Light intensity (Lux) readings, Exposure value (EV) analysis, Real-time white balance and tint guidance, Optional advanced metrics (Tint/Duv, CIE coordinates), Calibration tools for accuracy, Save, track, and export measurements

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $1.49 | per 7 days |
| Pro Version | $3.99 | per month |
| Pro Version | $14.99 | per year |
| Pro Version | $25.99 | one-time |


## Frequently asked questions

### Is SecurityKeys free?

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

### Is kelvin light scale free?

kelvin light scale is free to download, with in-app purchases available.

### Do SecurityKeys or kelvin light scale have ads?

Neither SecurityKeys nor kelvin light scale shows ads.

---

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