# 熱中症警戒計 vs 花粉 週間予報

The clearest difference is in-app purchases: 熱中症警戒計 at none against 花粉 週間予報's 5. 花粉 週間予報's advantage is update cadence (every 3 weeks vs every 5 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. 花粉 週間予報 sells 5 in-app purchases, starting at $2.99 per month. 熱中症警戒計 asks for nothing beyond the download.

熱中症警戒計 ships an update every 5 months, 花粉 週間予報 every 3 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 熱中症警戒計 | 花粉 週間予報 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **55.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 73 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

### 熱中症警戒計

[App page](https://appshunter.io/ios/app/id537953117)

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

**In-app purchases:** none


### 花粉 週間予報

[App page](https://appshunter.io/ios/app/id6478220308)

Get real-time pollen forecasts across Japan to plan your outings with confidence. View daily pollen levels in easy-to-understand graphs and check the weekly forecast to prepare for high pollen days. Save your favorite locations for quick access to local pollen information.

**Highlights:** Nationwide pollen information, Daily pollen levels graph, Weekly pollen forecast, Register favorite locations, Real-time pollen data

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告停止 | $2.99 | per month |
| Coffee (Regular) | $0.49 | one-time |
| Coffee (Large) | $1.99 | one-time |
| システム改善応援募金 | $1.99 | one-time |
| Cake Set | $5.99 | one-time |


## Frequently asked questions

### Is 熱中症警戒計 free?

熱中症警戒計 is free to download, with no in-app purchases.

### Is 花粉 週間予報 free?

花粉 週間予報 is free to download, with in-app purchases available.

### Do 熱中症警戒計 or 花粉 週間予報 have ads?

Both 熱中症警戒計 and 花粉 週間予報 show ads.

### Which is updated more often, 熱中症警戒計 or 花粉 週間予報?

熱中症警戒計 ships an update every 5 months, and 花粉 週間予報 every 3 weeks. Most recently, 熱中症警戒計 was updated on October 29, 2026 and 花粉 週間予報 on October 27, 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.*