iPhone Screenshots


Receive alerts of Gravitational Wave Events from the LIGO/Virgo Collaboration (LVC) on your iPhone.

This is an app for both the LIGO/Virgo Community and the general public. It provides low latency alerts using the Open Public Alerts currently being deployed by the Gamma-ray Coordinates Network (GCN) through GCN/LVC Notices (https://www.ligo.org/scientists/GWEMalerts.php). To receive alerts using the app just select the category of alerts you wish to receive - it's that simple!

The O3 observing run ended in March 2020. O4 is expected to start in 2021. The app will download all O4 events and counterparts as they are reported through a GCN Notice in addition to any related GCN Circulars. The app database is pre-populated with selected Notices and Circulars from all previous O1, O2 and O3 events. The app retains Notices for one Mock Event reported through GCN for testing purposes. (For information on LIGO/Virgo Collaboration GCN Notices see: https://gcn.gsfc.nasa.gov/lvc.html.)

Includes an interactive sky map showing the location of each event.

The app also has a public Message exchange bulletin board and some interesting Links. The Links provide information on Gravitational Waves and the LIGO and Virgo observatories.

What’s New

Version 1.9.4

Option to hide all retracted and terrestrial Events.
Option to show Bayestar or LALInference sky map.

Ratings and Reviews

4.7 out of 5
18 Ratings

18 Ratings

Xioxygen ,

Love this app to tracking the latest GW

I am not an astronomer but I use this app several times a day.

This app is easy to use.

Few more suggestions.

1. Should be okay to delete/hide event by swiping to the right. Like some email app.

2. Maybe mark different events by colors?

3. Add personalized filter to see a certain event like BNS only :)

Update on 1.9.1

Thanks for updating. Here are few more suggestions:

1. Add delete function to each event. And there should be no update once related event been deleted.

2. Maybe link user event comments to each related event.

bugjar ,

Love this app

While I am not an astronomer or astrophysicist, I am delighted that the scientific community created an app to allow ordinary people like myself to share in the potential discovery of new GW events. While the communications are very technical, I look forward to seeing new events.

Anm8t ,

Armchair physicists unite!

What an amazing idea! Cannot wait to see what’s in store from LIGO and the depths of our universe! Let’s go!

App Privacy

The developer, Peter Kramer, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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