# 熱中症ナビ vs Sun Event

The clearest difference is ads: 熱中症ナビ at none against Sun Event's shown. 熱中症ナビ also leads on iOS requirement (5.1.1 vs 16.7.10). Sun Event's advantage is update cadence (every 2 weeks 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, Sun Event every 2 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 熱中症ナビ | Sun Event |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Size | 31 MB | 36 MB |
| Requires iOS | **5.1.1** | 16.7.10 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Saraya Co.,Ltd.](https://appshunter.io/developer/651968368) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## 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


### Sun Event

[App page](https://appshunter.io/ios/app/sun-event/id6503113277)

**Features:** macOS Compatibility

**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 Sun Event free?

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

### Do 熱中症ナビ or Sun Event have ads?

Sun Event shows ads; 熱中症ナビ does not.

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

熱中症ナビ ships an update every 6 weeks, and Sun Event every 2 weeks. Most recently, 熱中症ナビ was updated on October 8, 2026 and Sun Event on October 7, 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.*