# WBGT アラート vs 防災ストック

The clearest difference is in-app purchases: WBGT アラート at none against 防災ストック's 1. WBGT アラート also leads on update cadence (weekly vs every 3 months) and iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. 防災ストック sells 1 one-off in-app purchase. WBGT アラート asks for nothing beyond the download.

WBGT アラート ships an update weekly, 防災ストック every 3 months. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | WBGT アラート | 防災ストック |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 3 months |
| Size | 42 MB | 22 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JUNGLAE JO](https://appshunter.io/developer/6780321351) | [RYOSUKE HIRAMATSU](https://appshunter.io/developer/616750780) |

## What reviewers say

### WBGT アラート

[App page](https://appshunter.io/ios/app/wbgt/id6780366425)

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

**In-app purchases:** none


### 防災ストック

[App page](https://appshunter.io/ios/app/id6785332349)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hidden Ads | $2.99 | one-time |


## Frequently asked questions

### Is WBGT アラート free?

WBGT アラート is free to download, with no in-app purchases.

### Is 防災ストック free?

防災ストック is free to download, with in-app purchases available.

### Do WBGT アラート or 防災ストック have ads?

Both WBGT アラート and 防災ストック show ads.

### Which is updated more often, WBGT アラート or 防災ストック?

WBGT アラート ships an update weekly, and 防災ストック every 3 months. Most recently, WBGT アラート was updated on October 31, 2026 and 防災ストック 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.*