# 熱中症予報計 vs WBGT

The clearest difference is review sentiment: WBGT at 83% against 熱中症予報計's 35%. WBGT also leads on update cadence (monthly vs every 5 months). 熱中症予報計's advantage is in-app purchases (none vs 4). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WBGT sells 4 one-off in-app purchases. 熱中症予報計 asks for nothing beyond the download.

熱中症予報計 ships an update every 5 months, WBGT monthly. The most recent releases landed on September 16, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 熱中症予報計 | WBGT |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 35.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 70 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Izaki](https://appshunter.io/developer/511591595) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## 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


### WBGT

[App page](https://appshunter.io/ios/app/wbgt/id1629786837)

This app helps you monitor the Heat Stroke Index (WBGT) based on temperature, humidity, and weather conditions. It provides hourly forecasts to aid in heatstroke prevention for outdoor activities and travel.

**Highlights:** Hourly WBGT forecasts, Current location WBGT, Nationwide WBGT, Heatstroke prevention guidance, Outdoor activity planning

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee (Regular) | $0.49 | one-time |
| アプリケーション開発者への応援募金 | $1.99 | one-time |
| Coffee (Large) | $1.99 | one-time |
| Cake Set | $5.99 | one-time |


## 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 WBGT free?

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

### Do 熱中症予報計 or WBGT have ads?

Both 熱中症予報計 and WBGT show ads.

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

熱中症予報計 ships an update every 5 months, and WBGT monthly. Most recently, 熱中症予報計 was updated on September 16, 2026 and WBGT on September 17, 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.*