iPhone Screenshots


Measure everything that vibrates, shakes or moves. Or why not an actual earthquake?

Seismometer uses your iPhone's built in accelerometer to measure movements in two axes, calculate the resulting energy and draw the results on a rolling logarithmic scale.


* Different signal filters
* Highly configurable
* Recordings
* CSV exporting of recordings
* UDP Streaming

http://yellowagents.com/seismometer/ for more info and examples of how to use the streaming protocol.

What's New

Version 2.4

iOS 11 support

Ratings and Reviews

3.8 out of 5
14 Ratings
14 Ratings

Very Cool - Even cooler when there are actual stats

Someone asked for a use-case - ie why would I want this app? Night photography: How still really is your camera for a long exposure shot? Take a measure, adjust as needed.

This is a great app and fun. Would love see some stats that can viewed and saved for later comparison. The Roller Coaster Physics app is along the lines of this app, and now allows you to email a full run of the measurements for later loading into Excel or other app. Looking forward to a new version

Ke6vrk ,

No way to get data out of the app

If you have a lot of data the app will just crash- totally useless. We had an earthquake in Los Angeles about an hour ago, and I wanted to show off this app, but it only crashes when you try to look at a history file that recorded for only 13 hours. It won’t email or send to documents which does nothing. I tried accessing the data from my MacBook Pro using an iPhone backup program, and the app no longer will allow access to its folders. Wish I could see the data.
If the developer wants to reach me feel free to email me. I like the display screen but too bad it didn’t perform when I needed it to.

haey ,

Very poor implementation.

I know there are only two other reviews that give high praise, but one must be from the developer. This seismometer only displays one axis at a time…. a bit useless if you a trying to record all 3 or even just two for that matter. The streaming feature SEEMS to work well…. except it only displays the Z axis even if you select the Y or X axis. It will ONLY stream the Z axis. Since earthquakes and other shaking rarely occur on a single axis, and most are rarely on the Z axis (up/down), this is completely useless.

Allow displaying/recording of multiple axis, and allow the stream to display ANY other axis besides the Z axis, and it will be a GREAT app.

Developer Response ,

The streaming feature does stream all 3 axis, maybe you're confused by that one of the open-source demo apps only displays the Z axis. Check the python example and protocol spec for more information https://yellowagents.com/seismometer/protocol.html


FFFF00 Agents AB
2.7 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Johan Nordberg


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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