QuakeAlert alerts that you than an earthquake has just occurred and gives you a warning before the shaking starts.
Users have the ability to set the app so they are notified of all earthquakes, or events of 4.0- magnitude or greater, which are likely to be felt. The EEW app uses the technology of the U.S. Geological Survey earthquake monitoring system to send the alerts, part of that agency’s ShakeAlert program, which identifies energy waves.

Warning times can range from seconds to tens-of-seconds minutes depending on the location, depth, and magnitude of the earthquake’s epicentre. More warning time could be provided when the recipient is farther from the epicenter, and less warning time is likely provided when the epicenter is closer.

What’s New

Version 2.3

Updated sign up flow for the new users

Ratings and Reviews

2.6 out of 5
67 Ratings

67 Ratings

Greg Takashi ,

Needs a facelift

The concept of the app is great. I’m glad ShakeAlert is finally being released statewide in CA. However, the more recent user interface of this app looks dated than the older user interface. Additionally there are issues with text showing up while using dark mode. Based off the simulation option provided, the alert sounds sound clunky as it seems like the words e.g. “very strong” and “shaking” are pieced together from different recordings. It would be nice if the alert tones were different depending on the severity of the shaking as well.

Slammy Boy ,

This app WILL save lives.

Yeah, yeah. I know this app hasn't been fully released to the public yet at the time of this review, but for those who will have it when the 'Big One' hits, this will save many lives.

If this saves at least one life, it's still worth it. Not every app out there directly saves human lives. Did I forget to mention that it's free?

Bottom Line: If you live anywhere in California, this app will and should be pre-installed on every phone. That's how necessary it is.

Dave8659 ,

Company Needs to Update Users Better

I received an email on January 4 saying I would be activated within 90 days. I have not heard a word and still can’t activate the application. This app will be awesome once available to activate but as of now I am frustrated by the lack
Of communication/updates from the company regarding the status of activation. I also emailed them and never received a reply.


EarlyWarningLabs LLC
31.6 MB

Requires iOS 9.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
Copyright © EarlyWarningLabs LLC 2015


  • Family Sharing

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

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