Totality by Big Kid Science 4+

Your Solar Eclipse Companion

Germinate LLC

Designed for iPad

    • 4.6 • 66 Ratings
    • Free



We've added new total solar eclipses for 2026, 2027, 2028, and 2030!

A total solar eclipse is among the most awe-inspiring events in nature, but few people have had the opportunity to experience one. Totality by Big Kid Science, a FREE educational app now owned by the nonprofit American Astronomical Society, aims to help change that by helping you learn about eclipses and find your way to upcoming eclipses around the world, including the 2023 annular and 2024 total eclipses that will pass across North America.

Totality, your solar-eclipse companion, is sponsored by the nonprofit American Astronomical Society. Its awesome features include:

• An interactive map that shows exactly what you’ll see at any location in the world for upcoming annular and total solar eclipses, as well as a review of recent past eclipses. (Maps based on eclipse code graciously provided by Xavier Jubier.)
• Using your phone's GPS, the app will tell you what you'll see for these eclipses at your current location, as well as showing you the nearest locations where you can witness annularity or totality.
• The app offers navigation tools to help you find your best route to the path of totality.
• The Learn screen offers options that will help you learn how to view a solar eclipse safely, help you understand the science behind eclipses, and much more. It even includes a set of classroom activities.
• The Shop screen offers fantastic books about space and science (including a children’s book designed to accompany the app), eclipse glasses for safe viewing (which you can use to look at the Sun at any time, not just during an eclipse), and links to some of our favorite space education nonprofits.

And it's all absolutely free, including no ads, brought to you as a public service by Big Kid Science and the American Astronomical Society.

Totality by Big Kid Science is now available in English, Spanish, French, and Portuguese (determined by the language setting on your device).

Privacy Policy:

What’s New

Version 4.0.1

Multilingual updates and minor bug fixes

Ratings and Reviews

4.6 out of 5
66 Ratings

66 Ratings

Teodoro Panadero ,

Excellent Solar Eclipse App!

Having many un-fond memories of plotting the centerline and north & south limits of the July 11, 1991 & other total solar eclipses on photocopied paper maps, I was delighted when I discovered the Totality app a couple of months ago! The interactive eclipse track map in Totality is truly welcome. Plus, the map displays your current location, thus leaving no doubt as to your position relative to the centerline.

Kudos to the highly responsive developer who has today released version 4.0.1 which fixed an intermittent crashing-on-launch issue that the 4.0.0 version released 3 days ago had, so the app is solid & stable once again.

I highly recommend this easy to use (and free) app which is suitable for eclipse chasers of any level of experience.

ScienceLabGirl ,

Big Stars for Big Kid Science

I love the interactive map feature. The details of the map surpass other apps that I have looked at in preparation of the eclipse. I've even been able to use it to pinpoint the best spot on the lake to watch! I'm an elementary science lab teacher in KY where we have a path of totality nearby so I especially appreciate the tabs available to educate people about eclipses and the section on classroom activities. Ironically, I already had some of the exact activities in my lesson plans for the next couple of weeks. The free app is definitely worth taking the time to download in time for the eclipse even if you've waited until the last minute!

EatCroc3 ,

Best eclipse app I have found

It gives detailed information about the eclipse at your location or any location. Great for scouting out locations to determine if trees or mountains will obstruct any part of the eclipse.

The Azimuth/Altitude of each contact is extremely helpful. It isn't clear if the azimuth is referenced to true or magnetic north. I assume true, but if the app were explicit about this, it would remove any doubt.

App Privacy

The developer, Germinate LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Location
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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