# 熱中症アラート vs WBGT

The clearest difference is in-app purchases: 熱中症アラート at none against WBGT's 4. 熱中症アラート also leads on ads (none vs shown) and iOS requirement (7.0 vs 15.6). WBGT's advantage is update cadence (every 6 weeks vs every 12 months) and review sentiment (83% vs 57%). On price and device support there is nothing between them.

Both are free to download. WBGT sells 4 one-off in-app purchases. 熱中症アラート asks for nothing beyond the download.

熱中症アラート ships an update every 12 months, WBGT every 6 weeks. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 熱中症アラート | WBGT |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 57.1% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 70 MB |
| Requires iOS | **7.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [日本気象株式会社](https://appshunter.io/developer/517668176) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## What reviewers say

### 熱中症アラート

[App page](https://appshunter.io/ios/app/id836424089)

This app provides real-time heatstroke risk levels based on the heatstroke index. It offers notifications and advice from a weather mascot, with customizable settings for regions and alert thresholds. Data is updated every 10 minutes.

**Highlights:** Real-time heatstroke risk levels, Customizable notifications, Heatstroke index graph, Weather mascot advice, Region-specific settings, 10-minute data updates

**Features:** 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 熱中症アラート free?

熱中症アラート is free to download, with no in-app purchases.

### Is WBGT free?

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

### Do 熱中症アラート or WBGT have ads?

WBGT shows ads; 熱中症アラート does not.

### Which is updated more often, 熱中症アラート or WBGT?

熱中症アラート ships an update every 12 months, and WBGT every 6 weeks. Most recently, 熱中症アラート was updated on November 1, 2026 and WBGT on November 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*