# iShindo - Seismic Intensity

> Measures earthquake seismic intensity using iPhone/iPad with multiple scales and iCloud sync. (iPhone/iPad app by Hakusan Corporation.)

- Source: https://appshunter.io/ios/app/ishindo-seismic-intensity/id720738431 (this page in markdown: same URL + `.md`)
- Developer: [Hakusan Corporation](https://appshunter.io/developer/386745652)
- Category: Weather, Education
- Price: Free
- Rating: 4.00/5 from 3 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 3 MB
- Languages: American English, Japanese, Chinese (Simplified, China), European Spanish
- Released: 2013-11-25
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ishindo-seismic-intensity/id720738431/reviews.md

## What is iShindo?

iShindo measures earthquake seismic intensity using your iPhone or iPad.

FEATURES
• Seismic intensity measurement based on the JMA (Japan Meteorological Agency) method
• Modified Mercalli Intensity (MMI) measurement
• Spectral Intensity (SI) measurement
• Automatic earthquake event recording and list view
• Photo capture during earthquake events
• iCloud sync across devices (up to 10)

INTENSITY SCALES
• JMA Seismic Intensity Scale (0–7)
• Modified Mercalli Intensity Scale (I–XII)

TECHNOLOGY
Intensity calculations comply with the JMA instrumental intensity method. SI values comply with the MLIT-specified method. Developed with patented technology from joint research with NIED (National Research Institute for Earth Science and Disaster Prevention).

NOTE
Measurements are not from JMA-certified seismometers. Values are "equivalent intensity" for reference only.

REQUIREMENTS
• iOS 16.0 or later
• iPhone 8 / X or later, iPad with iPadOS 16

## Key features

- Seismic intensity measurement (JMA, MMI, SI)
- Automatic earthquake event recording
- Photo capture during events
- iCloud sync across devices
- JMA Seismic Intensity Scale (0-7)
- Modified Mercalli Intensity Scale (I-XII)

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/ishindo-seismic-intensity/id720738431/reviews.md

### 4/5 — 横向き表示ができなくなりました

*2026-05-02*

以前までは横向き表示ができていたのですが、アップデートの影響なのか、現在はできなくなっています。
また、他のiPhoneでも横向き表示ができない状態です。
横向き表示ができるよう、改善していただけるとありがたいです。

### 5/5 — 地震計アプリ

*2024-11-04*

メルカリ震度と気象庁震度が見れますすごく便利です
実際の地震を測れるかはわかりませんが(こないで)

### 1/5 — やばい

*2024-08-09*

そもそもアプリ開けない💦

### 2/5 — 不正確

*2023-06-15*

正直言って、スマホを持ち上げるだけで
震度 6+ が出るのはおかしいと思う
震度を正しく計測してくれれば★５確定です
そこの所改善お願いします！

### 4/5 — 画面収録ができません

*2022-11-03*

家が交通振動で揺れるため、どのくらい揺れているかを記録したくてiPadで画面収録をして記録していましたが、最近、
『photostreamにアクセス出来ません。本アプリケーションはphotostream経由であなたのデバイス間で写真を共有できますので、設定アプリから’写真とカメラ＞自分 のphotostream 'のオンをを推奨します。』
と表示されるようになり、設定を確認しましたがphotostreamの設定が私のiPadにもiPhoneにもなく、どうにもできません。
アプリ自体はシンプルで分かりやすくてとても使いやすいので、できれば改善していただきたいです。
オプションで課金が必要でも改善して頂きたいです。

### 2/5 — I can’t even take photos

*2022-06-03*

App is awful, the only thing to do was change the settings. Never buy this app. Big Waste Of Time.

### 5/5 — Eじゃん

*2018-08-24*

Eじゃん

### 5/5 — Love it

*2017-06-02*

It's ok

### 3/5 — ちょっと・・・

*2016-09-26*

アプリ開かないと計測できない

### 5/5 — グッド！

*2016-08-14*

素晴らしい

## Frequently asked questions about iShindo

### What is iShindo's primary function?

iShindo measures earthquake seismic intensity using your iPhone or iPad. It provides measurements based on JMA, Modified Mercalli, and Spectral Intensity scales, and can automatically record earthquake events.

### Does iShindo provide official earthquake alerts?

No, iShindo's measurements are for reference only and are not from JMA-certified seismometers. They are considered 'equivalent intensity'.

### What devices is iShindo compatible with?

iShindo is compatible with iPhone and iPad devices running iOS 16.0 or later. It requires an iPhone 8/X or later, or an iPad with iPadOS 16.

### How often is iShindo updated?

The latest version of iShindo was released on March 27, 2026, indicating recent development activity. The app was first released in 2013.

### Can I use iShindo on multiple devices?

Yes, iShindo supports iCloud sync across up to 10 devices, allowing you to access your recorded earthquake events on any of your compatible Apple devices.

### What are the different intensity scales iShindo uses?

iShindo uses the JMA Seismic Intensity Scale (ranging from 0 to 7) and the Modified Mercalli Intensity Scale (ranging from I to XII), as well as Spectral Intensity (SI) measurement.

### Does iShindo have ads?

No, iShindo does not contain advertisements. It is a free application without any ad interruptions.

### What is the user rating for iShindo?

iShindo has a user rating of 4.0 stars based on 3 ratings. This suggests a generally positive reception from its current user base.

## Version history (last 5 releases)

### 2.1.0 — 2026-07-31

Implemented landscape mode

### 2.0.0 — 2026-03-27

iShindo is designed for iPhone and iPad running iOS 16 or later.

### 1.3.3 — 2017-03-04

This app has been updated by Apple to display the Apple Watch app icon.

- iOS 10 support
- Bug fixes

### 1.2.2 — 2015-01-25

- iOS 8.1 support
- Bug fixes

### 1.1 — 2014-03-13

- iOS 7.1 support
- Bug fixes

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## More apps by Hakusan Corporation

- [iJishin](https://appshunter.io/ios/app/ijishin/id386745649)

All apps by Hakusan Corporation: https://appshunter.io/developer/386745652

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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 2026-08-25.*