Totality: Your Solar Eclipse Companion

Put essential information about recent (since 2017) and upcoming (through 2050) total solar eclipses in your pocket with Totality by Big Kid Science, available FREE for iOS and Android smartphones and tablets! Now in version 5, Totality is sponsored by the American Astronomical Society and includes the following features, among others:

  • Interactive maps of recent (since 2017) and upcoming (through 2050) total solar eclipses worldwide, including this year’s and next year’s. (The 2027 total solar eclipse features the longest duration of totality in the 21st century!) All maps are based on code by renowned eclipse expert Xavier Jubier.
  • For a given eclipse…
    • Zoom, scroll, and tap to move around each map, get a table of eclipse circumstances at any location, and bring up additional details.
    • Get custom information (using your phone’s GPS) about what you can see at your current location.
    • Find the nearest location where you can witness totality, the location along the path where totality lasts the longest, and, where possible, driving directions to the eclipse’s central line.
  • Information on how, when, and why solar eclipses occur, as well as how to observe them safely and enjoyably.
  • An upgraded user interface and User Guide, and new Quick Start and How to Use screens.

And it's all FREE — with no ads — created as a public service by Big Kid Science and the American Astronomical Society.

Get Totality for iOS  Get Totality for Android

Totality v5 Screen Grabs
Left: The Totality app's splash screen. Center-left: Pull up this handy tutorial at any time from the main menu. Center-right: Easily access interactive maps of future total solar eclipses through 2050. Right: Map of the August 12, 2045, total solar eclipse across the Americas. The central line is blue, with black on either side to show the full width of the path of totality. The green lines show the northern and southern limits of the partial eclipse. Click on the image to bring up a larger version.

Totality by Big Kid Science is available for iOS and Android devices in English, Spanish, French, and Portuguese. (The appropriate language appears automatically based on your device’s language setting.) The update to version 5 was funded by the AAS Solar Eclipse Task Force with support from NASA and the National Science Foundation.

Get Totality for iOS  Get Totality for Android

Totality v5 Screen Grabs
Left: Tap a spot in the path of totality — in this example, for the solar eclipse of August 12, 2045 — to pull up a summary of the total eclipse at that location. Center-left: After tapping the DETAILS button, you get detailed eclipse circumstances there. Center-right: Tap a spot outside the path to pull up a summary of the partial eclipse at that location. Right: After tapping the DETAILS button, you get detailed eclipse circumstances there. Each simulated eclipse illustration shows approximately what you'll see at maximum eclipse at the location you've specified. Click on the image to bring up a larger version.

Credits:

  • Developer: Germinate LLC
  • Eclipse code: Xavier Jubier
  • Concept and content: Jeffrey Bennett
  • Scientific and editorial advisor: Rick Fienberg
  • App owner: The American Astronomical Society

To learn more, see the app's page at Big Kid Science. For links to more eclipse-related smartphone apps, programs for desktop and laptop computers, and other useful resources, see our Apps & Software page.