# 熱中症ナビ vs UVready

The clearest difference is ads: 熱中症ナビ at none against UVready's shown. 熱中症ナビ also leads on iOS requirement (5.1.1 vs 16.0). UVready's advantage is review sentiment (100% vs 78%) and update cadence (fortnightly vs every 6 weeks). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

熱中症ナビ ships an update every 6 weeks, UVready fortnightly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 熱中症ナビ | UVready |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 77.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | — | Ad-supported |
| Size | 31 MB | 8 MB |
| Requires iOS | **5.1.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Saraya Co.,Ltd.](https://appshunter.io/developer/651968368) | [Appetizer](https://appshunter.io/developer/515390190) |

## What reviewers say

### 熱中症ナビ

[App page](https://appshunter.io/ios/app/id651968365)

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

**In-app purchases:** none


### UVready

[App page](https://appshunter.io/ios/app/uvready/id6759196899)

Get instant UV index readings with a single tap. Understand current and hourly UV levels, receive personalized safe sun exposure times based on your skin type, and get alerts for changes. It's a quick and simple way to protect your skin year-round.

**Highlights:** Instant UV index check, Hourly UV forecast, Personalized safe exposure time, Intuitive emoji guidance, UV level change alerts, Instant sharing of UV conditions

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

**In-app purchases:** none


## Frequently asked questions

### Is 熱中症ナビ free?

熱中症ナビ is free to download, with no in-app purchases.

### Is UVready free?

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

### Do 熱中症ナビ or UVready have ads?

UVready shows ads; 熱中症ナビ does not.

### Which is updated more often, 熱中症ナビ or UVready?

熱中症ナビ ships an update every 6 weeks, and UVready fortnightly. Most recently, 熱中症ナビ was updated on November 1, 2026 and UVready on November 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.*