# UV Light vs Hardness Conversion Master

The clearest difference is ads: UV Light at none against Hardness Conversion Master's shown. UV Light also leads on iOS requirement (15.0 vs 17.6). Hardness Conversion Master's advantage is update cadence (every 3 days vs fortnightly). On price, in-app purchases and device support there is nothing between them.

Both are free to download. UV Light sells 3 in-app purchases, starting at $4.99 per 7 days and Hardness Conversion Master sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UV Light ships an update fortnightly, Hardness Conversion Master every 3 days. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | UV Light | Hardness Conversion Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/uv-light-sunscore/id6754123884/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 259 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [明航 李](https://appshunter.io/developer/1823569127) | [POYU WANG](https://appshunter.io/developer/1883764660) |

## What reviewers say

### UV Light

[App page](https://appshunter.io/ios/app/uv-light-sunscore/id6754123884)

This app provides real-time UV index readings and forecasts for your location. It offers personalized sun protection advice and color-coded protection levels to help you stay safe in the sun. Enjoy sunny days with confidence and protect your skin.

**Highlights:** Real-time UV index readings, 24-hour UV forecast, Peak UV alerts, Color-coded protection levels, Personalized safety recommendations, Intuitive interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $4.99 | per 7 days |
| Unlimited access | $24.99 | per year |
| Unlimited access | $49.99 | one-time |


### Hardness Conversion Master

[App page](https://appshunter.io/ios/app/hardness-conversion-master/id6760411989)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $1.99 | one-time |


## Frequently asked questions

### Is UV Light free?

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

### Is Hardness Conversion Master free?

Hardness Conversion Master is free to download, with in-app purchases available.

### Do UV Light or Hardness Conversion Master have ads?

Hardness Conversion Master shows ads; UV Light does not.

### Which is updated more often, UV Light or Hardness Conversion Master?

UV Light ships an update fortnightly, and Hardness Conversion Master every 3 days. Most recently, UV Light was updated on October 20, 2026 and Hardness Conversion Master on October 5, 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.*