Update: This deal has expired.

The total solar eclipse on Aug 21 is a rare event! Fifth Star Labs is celebrating its occurrence by making the app Sky Guide: View Stars Night or Day completely free for iOS. This app fluctuates between $1.99 and $2.99 normally and hasn't been free since 2015.

Not only is the app free, but Fifth Star Labs also updated it with info for the 2017 solar eclipse. Once you've downloaded the app, just click the Search button in the top right corner and you'll see a section for "2017 Solar Eclipe." This area has a map with the eclipe's travel path and a breakdown of important times you'll need to know based on your location (when it begins and ends, how long it will last, etc).

Beyond the solar eclipse you can find tons of great information on the sky. Other features include:

  • Use Sky Guide anywhere—on your evening dog walk, camping trips or in the classroom. Sky Guide works with or without Wi-Fi, cellular service or GPS, so everything is at your fingertips no matter where you go.
  • Apple Watch app
  • 3D Touch: Peek and Pop previews of articles from Search. Quick actions from home screen app icon.
  • Notification Center Widget: At-a-glance essentials including rise and set times for the Sun, Moon and planets.
  • Filter: X-ray the sky and explore invisible wonders (now enhanced with 3D Touch).
  • Red night mode: Preserve your dark-adapted eyesight.
  • Huge stellar catalog: 2.5 million stars!

This is a very popular app with more than 41,000 iTunes reviews and a five star rating. Also, based on my recent download, it plays very hypnotic music while idling on your desk.

If you're definitely interested in watching the solar eclipse, remember that it's dangerous to stare directly at the sun. Get safety glasses before the Aug 21 showdown.

Also, checkout iMore's rundown of how to get the most out of your phone for the solar eclipse. A free app is a good place to start.

See at iTunes