# 熱中症予報計 vs 熱中症ナビ

The clearest difference is review sentiment: 熱中症ナビ at 78% against 熱中症予報計's 35%. 熱中症ナビ also leads on ads (none vs shown) and update cadence (every 6 weeks vs every 5 months). 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.

熱中症予報計 ships an update every 5 months, 熱中症ナビ every 6 weeks. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 熱中症予報計 | 熱中症ナビ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 35.0% of reviews | **77.8% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Size | 7 MB | 31 MB |
| Requires iOS | 15.6 | **5.1.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Izaki](https://appshunter.io/developer/511591595) | [Saraya Co.,Ltd.](https://appshunter.io/developer/651968368) |

## What reviewers say

### 熱中症予報計

[App page](https://appshunter.io/ios/app/id647598956)

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

**In-app purchases:** none


### 熱中症ナビ

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

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

**In-app purchases:** none


## Frequently asked questions

### Is 熱中症予報計 free?

熱中症予報計 is free to download, with no in-app purchases.

### Is 熱中症ナビ free?

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

### Do 熱中症予報計 or 熱中症ナビ have ads?

熱中症予報計 shows ads; 熱中症ナビ does not.

### Which is updated more often, 熱中症予報計 or 熱中症ナビ?

熱中症予報計 ships an update every 5 months, and 熱中症ナビ every 6 weeks. Most recently, 熱中症予報計 was updated on September 16, 2026 and 熱中症ナビ on September 21, 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.*