# iSeismometer: Seismograph — Measure vibration and quakes

> iPhone seismometer app for detecting and visualizing vibrations. (iPhone/iPad app by ObjectGraph LLC.)

- Source: https://appshunter.io/ios/app/iseismometer-seismograph/id304190739 (this page in markdown: same URL + `.md`)
- Developer: [ObjectGraph LLC](https://appshunter.io/developer/284700705)
- Category: Education, Utilities
- Price: Free
- Rating: 3.60/5 from 172 App Store ratings · 272 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 3 MB
- Languages: American English, French (France), German (Germany), Japanese, European Spanish
- Released: 2009-02-22
- Data updated: 2026-11-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/iseismometer-seismograph/id304190739/reviews.md

## What is iSeismometer?

iSeismometer turns your iPhone or iPad into a seismograph. Set it on a table, tap the desk, and watch the ground move. You will be surprised how sensitive your phone is.

It has been doing that since the App Store opened in 2008, when it reached #1 in Education in Japan, Austria, Finland, and Greece. Version 1.7 is a complete rebuild: faster, clearer, and finally a real instrument.

LIVE SEISMOGRAPH
• Three axes at up to 100 samples per second, drawn like a strip-chart recorder
• Scroll back through up to an hour of history while it keeps recording
• Gravity filter with a real corner frequency, so slow tilt disappears and earthquakes stay
• Live spectrum: see the frequency of footsteps, a washing machine, or a passing truck at a glance
• Dark mode and a full iPad layout

EVENT DETECTION
• A seismologist's STA/LTA trigger flags every tremor with its peak acceleration, duration, and dominant frequency
• Three sensitivity levels, from "only real shakes" to "every footstep"
• Events are shaded on the traces and listed so you can jump straight to them

RECORDINGS
• Every session is saved automatically as compact raw data, split into hourly files
• Browse by day, open any recording, scrub to its events, and see its spectrum
• Export CSV, or pick up the raw files in the Files app and in Finder
• Keep them for a day, a week, a month, or forever

WAS THAT AN EARTHQUAKE?
• Live USGS feed on a globe, filtered by time window and magnitude
• Tap a quake for its depth, time, and the official USGS page

STREAM TO YOUR MAC
• Open iSeismometer on a Mac on the same Wi-Fi and your phone finds it by itself
• The Mac shows every device streaming to it side by side, with its own recordings and event detection
• Reconnects on its own after the screen locks, the network drops, or the Mac restarts

Made for fun and for learning. A phone carries a MEMS accelerometer, not a broadband seismometer, so it feels footsteps and trucks far better than distant earthquakes. Put it on a solid floor, plug it in, keep the screen awake, and you have a home seismic station. iSeismometer is not a substitute for official earthquake early warnings or emergency alerts.

Questions and ideas: info@objectgraph.com

"This is a novelty app but one that also helps you learn something new... one of those things that is very captivating once you've looked at it once." — The Independent Guide to the iPhone 3GS

## Key features

- Converts iPhone to seismometer
- Detects and visualizes vibrations
- Data collecting capabilities
- Educational use
- Adjustable frequency settings
- Re-track previous data
- X-Y-Z illustrated graphs

## What do users think of iSeismometer?

Reviews of iSeismometer are mostly positive: the Education app is rated 3.6/5 from 172 App Store ratings. What users like most: sensitive and accurate, simple and easy to use. Top complaints: crashes or freezes on newer devices, high battery consumption. Summarized from real user reviews.

**Pros**

- 🚀 Sensitive and accurate
- 👍 Simple and easy to use
- 💡 Useful for various applications (e.g. monitoring vibrations, detecting heartbeat)

**Cons**

- 🐛 Crashes or freezes on newer devices
- 🔋 High battery consumption
- 🔒 Lacks security/privacy features (e.g. no option to disable data transmission)

**Commonly reported bugs**

- Buttons/controls not working on newer iOS versions
- Keyboard not appearing in text input fields
- Inconsistent performance across device models

**Most requested features**

- Add sensitivity control
- Implement zero control for reference plane
- Increase recording time
- Improve UI/UX (e.g. color coding, scrolling, chart speed control)
- Implement Richter scale or other measurement units
- Add data export/sharing options (e.g. email, save to file)

## Is iSeismometer safe?

iSeismometer: Seismograph appears mostly safe based on user ratings. The AppsHunter Safety Score for iSeismometer is 72 out of 100. This assessment is based on 172 user ratings, with an App Store average of 3.6 out of 5. Of 172 App Store ratings, 61.6% point to a safe experience, 11.0% suggest some concerns, and 27.3% point to a risky experience.

## Is iSeismometer legit?

iSeismometer: Seismograph appears to be a legitimate app. The AppsHunter Legitimacy Score for iSeismometer is 95 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (10 of 272)

All indexed reviews: https://appshunter.io/ios/app/iseismometer-seismograph/id304190739/reviews.md

### 5/5 — WOW

*2023-11-24*

WOW

**Developer response:** Danke. iSeismometer 1.7 (September 2026) ist komplett neu gebaut für aktuelle iPhones, iPads und Macs: Live-Diagramme mit einer Stunde Verlauf, Ereigniserkennung, automatische Aufzeichnungen mit CSV-Export und eine Mac-App, die jedes Telefon im Haus empfängt.

### 5/5 — Plz do this

*2021-01-16, version 1.3*

I used this years ago and it was amazing but can you plz update it!!!!

### 1/5 — It would be better if it could be used on all iPhones

*2019-11-10, version 1.3*

If only this app were to be used on newer iPhones the could use it just like I did on my older iPhone.

### 5/5 — Please update this app for iso 11

*2019-05-03, version 1.3*

Please update !!!

### 5/5 — アップデート希望します！

*2019-04-15*

他の振動計アプリとは比較にならない程に優秀なアプリです。iosをアップデートしたら使えなくなっちゃいました。非常に困っています。

**Developer response:** お待たせしました。iSeismometer 1.7（2026年9月）は現行のiPhone、iPad、Mac向けに一から作り直しました。1時間分の履歴をさかのぼれるライブ波形、イベント検出、CSV書き出し付きの自動記録、家中のiPhoneを受信するMacアプリを備えています。

### 5/5 — 待更新

*2019-03-28*

很好用的一款软件，就是不更新ios12用不了了，求更新！

**Developer response:** 让您久等了。iSeismometer 1.7（2026 年 9 月）为现在的 iPhone、iPad 和 Mac 从头重写：可回看一小时历史的实时波形、事件检测、可导出 CSV 的自动记录，以及能接收家中每台手机数据的 Mac 版。感谢您的耐心。

### 5/5 — Обновление

*2019-03-06*

Обновите приложение пожалуйста.

### 5/5 — Great

*2019-01-23, version 1.3*

Great but doesn’t work on iOS 11+

### 5/5 — Good APP.

*2018-12-18, version 1.3*

Please update this APP.

### 1/5 — Keine aktuelle App

*2018-11-13*

Entwickler muß app für IOS 11 aktualisieren

## Frequently asked questions about iSeismometer

### What does the iSeismometer app do?

This app transforms your iPhone into a sensitive seismometer. It allows you to detect and visualize vibrations around your device, making it useful for educational purposes or data collection.

### What are the key features of iSeismometer?

Key features include converting your iPhone into a seismometer, detecting and visualizing vibrations, data collecting capabilities, adjustable frequency settings for sampling rate, and the ability to re-track previous data by dragging the screen.

### Is iSeismometer free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, indicating a completely free experience for users.

### What kind of data does iSeismometer collect?

The app stores data based on the frequency setting you choose. A higher frequency means an increased sampling rate per second, allowing for more detailed vibration data collection.

### What are some common use cases for iSeismometer?

Common use cases include educational experiments to learn about physics and vibrations, data collection for personal projects, or simply for fun to explore the sensitivity of your iPhone to external movements.

## Version history (last 5 releases)

### 1.7.2 — 2026-11-10

• Your Mac is a station: it keeps receiving with the window closed, stays out of idle sleep while a phone streams, posts a notification when a phone detects an event, opens at login if you like, and sits in the menu bar
• Copy the Mac's address with its port and paste it on the phone; VPN addresses are listed too, for networks that keep devices apart
• iPhone Duo: the drum fills the closed display with one time axis, and the open display puts the event list beside the traces
• Mac settings in tabs

### 1.7.1 — 2026-09-15

• 1.7.1: the app now speaks German, French, Spanish and Japanese. Connect to your Mac by address on networks that block Bonjour; the Mac shows its address and port under Receiver

iSeismometer has been rebuilt from the ground up.

• Smooth, fast charts that scroll back through up to an hour of history while recording continues
• Live spectrum with adjustable range, window, and averaging
• Event detection: tremors are flagged with peak acceleration, duration, and dominant frequency
• Automatic recordings, browsable by day, with CSV export and Files app access
• Gravity filter with a selectable corner frequency
• USGS earthquakes on a globe, with time and magnitude filters
• Mac app redesigned as a control center for every device streaming to it
• Auto-reconnect to your Mac, charging awareness, and a keep-awake option
• Dark mode, iPad layout, and a new launch screen

### 1.7 — 2026-09-07

iSeismometer has been rebuilt from the ground up.

• Smooth, fast charts that scroll back through up to an hour of history while recording continues
• Live spectrum with adjustable range, window, and averaging
• Event detection: tremors are flagged with peak acceleration, duration, and dominant frequency
• Automatic recordings, browsable by day, with CSV export and Files app access
• Gravity filter with a selectable corner frequency
• USGS earthquakes on a globe, with time and magnitude filters
• Mac app redesigned as a control center for every device streaming to it
• Auto-reconnect to your Mac, charging awareness, and a keep-awake option
• Dark mode, iPad layout, and a new launch screen

### 1.6 — 2024-05-04

bug fixes

### 1.5 — 2024-04-25

bug fixes

## Apps similar to iSeismometer

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| --- | --- | --- | --- |
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| [iJishin](https://appshunter.io/ios/app/ijishin/id386745649) | 1.0 (1) | Free | Education |
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| [SNEWS Events](https://appshunter.io/ios/app/snews-events/id1635008227) | 5.0 (3) | Free | Education |
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## More apps by ObjectGraph LLC

- [iRetroPhone - Rotary Dialer](https://appshunter.io/ios/app/iretrophone-rotary-dialer/id284700702)
- [iSameGame: SameGame in 3D](https://appshunter.io/ios/app/isamegame-samegame-in-3d/id291197345)
- [iHalloween: Haunted Porch](https://appshunter.io/ios/app/ihalloween-haunted-porch/id294063618)
- [Cat Piano: Keys That Meow](https://appshunter.io/ios/app/cat-piano-keys-that-meow/id312276994)
- [FocusQ: Numbers in Order](https://appshunter.io/ios/app/focusq-numbers-in-order/id312284907)

All apps by ObjectGraph LLC: https://appshunter.io/developer/284700705

## Related topics

[seismometer](https://appshunter.io/ios/topics/seismometer) · [seismic software](https://appshunter.io/ios/topics/seismic-software) · [seismograph](https://appshunter.io/ios/topics/seismograph) · [seismic activity](https://appshunter.io/ios/topics/seismic-activity)

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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 2026-11-10.*