# PM2.5チェッカー — 各都道府県毎のPM2.5詳細データ

> App to check PM2.5 observation values across Japan. (iPhone/iPad app by NORIHIKO HAYASAKA.)

- Source: https://appshunter.io/ios/app/pm25/id813487147 (this page in markdown: same URL + `.md`)
- Developer: [NORIHIKO HAYASAKA](https://appshunter.io/developer/512237338)
- Category: Weather, Utilities
- Price: Free
- Rating: 3.33/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 3 MB
- Languages: American English
- Released: 2014-02-11
- Data updated: 2026-08-15
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pm25/id813487147/reviews.md

## What is PM2.5チェッカー?

日本各地のPM2.5の観測値をチェックできるアプリです。
測定局の多い地域(東京等)では読み込みに時間がかかる場合があります。 
なかなか表示されない場合、読み込み中マークの回転が終わるまでお待ちください。

※日本のPM2.5の環境基準は日平均値35μg/m3以下です。

## Key features

- PM2.5 observation values
- Data by prefecture
- Environmental standards
- Loading indicator

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/pm25/id813487147/reviews.md

### 1/5 — 毎回の設定が面倒。

*2019-04-28*

一度登録したらすぐ出るようにしないと使いにくい。

### 2/5 — いいけど…

*2014-02-28*

毎回最初から地点を探すのめんどくさい

### 1/5 — 何もでてない

*2014-02-17*

測定局はどこでも空っぽ、何も見えない

## Frequently asked questions about PM2.5チェッカー

### What is PM2.5チェッカー?

PM2.5チェッカー is an application that allows you to check detailed PM2.5 observation values for each prefecture in Japan. It also provides information on Japan's environmental standard for PM2.5, which is a daily average of 35μg/m3 or less.

### Does PM2.5チェッカー have ads?

No, PM2.5チェッカー does not contain advertisements. It is a free application that focuses on providing air quality data.

### What is the rating for PM2.5チェッカー?

PM2.5チェッカー has a rating of 3.3 stars based on 3 user ratings. This indicates a generally positive but mixed user reception.

### On which devices can I use PM2.5チェッカー?

PM2.5チェッカー is supported on iPhone and iPod devices. It is designed for Apple's mobile operating system.

### How often is PM2.5チェッカー updated?

The latest version of PM2.5チェッカー is 1.1.0, which was last updated on October 9, 2018. The app has not received updates in several years.

### What is the age rating for PM2.5チェッカー?

PM2.5チェッカー has an age rating of 4+. This means it is suitable for users aged 4 and above, with no mature content.

### Can PM2.5チェッカー be slow to load?

Yes, PM2.5チェッカー may take time to load in areas with many measurement stations, such as Tokyo. Users are advised to wait for the loading indicator to finish rotating if the display is delayed.

### What is the environmental standard for PM2.5 in Japan?

Japan's environmental standard for PM2.5 is a daily average value of 35μg/m3 or less. PM2.5チェッカー provides this information for context.

## Version history (last 4 releases)

### 1.1.0 — 2018-10-09

- iPhone Xに対応
- 不具合修正

### 1.0.2 — 2014-03-09

- データ読み込み中文言を追加

### 1.0.1 — 2014-03-05

- 表示速度を改善

### 1.0 — 2014-02-11

No release notes.

## More apps by NORIHIKO HAYASAKA

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- [TypoBox](https://appshunter.io/ios/app/typobox/id521586000)
- [HANKO Maker](https://appshunter.io/ios/app/hanko-maker/id532842459)
- [ScanStamp](https://appshunter.io/ios/app/scanstamp/id535954869)

All apps by NORIHIKO HAYASAKA: https://appshunter.io/developer/512237338

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*