With Solar Eclipse Timer I become your personal solar eclipse astronomer and will talk you through a solar eclipse! This app was used successfully by thousands of people for the 2017 USA solar eclipse! Including professional eclipse chasers! See this information and all compiled reviews on my website

A major change for Version 2 is that it is not limited to just an upcoming eclipse! You now have the ability to work with future eclipses due to the feature of in-app purchases of future eclipses. You must buy the eclipse you are interested in for the app to function on eclipse day. When you buy an eclipse, the data for that eclipse becomes available for the app to work with. Then, on eclipse day, after you choose the proper eclipse from the list, you can be ready to time the eclipse with just "two taps". All total solar eclipses from 2019 in South America to 2024 in the United States can be purchased individually! However, still loaded in the app is the 2017 USA solar eclipse so you can practice using the app.

Solar Eclipse Timer still has the simple “Two Tap” setup. After you are in the path; 1. Tap To GPS Geolocate. 2. Tap to load the contact times! The app does its calculations internally. It does not require cell service or an internet connection to time the eclipse.

When you use Solar Eclipse Timer, it is one part of my three-part program of eclipse education and preparation. This app is integrated with my Solar Eclipse Timer YouTube channel and my website. It’s like having me as your person eclipse coach.


NEW USER INTERFACE - The new Select A Task screen makes using the app easy for everyone! New information dialogue boxes help guide you through the steps of using the app. This app is designed to be used by first-time eclipse observers as well as veteran eclipse chasers.
IN-APP PURCHASING OF UPCOMING ECLIPSES - Buy data sets for future eclipses so you can plan ahead.
PARTIAL ECLIPSE TIMING MODE - You can time any eclipse as a partial eclipse if you are not getting into the path of totality.
APP TUTORIAL VIDEO - There is a built-in app tutorial that will explain everything you need to know in 9 minutes.
DEVICE SOUND CHECK TESTS - Make sure your audio and notification settings are correctly enabled in your device.
NEW ECLIPSE PRACTICE VIDEO - The practice video has been changed and improved. This is a unique training feature.
NEW ANNOUNCEMENTS - Announcements have been added, improved and the timing adjusted. Now reminders for working with camera solar filters.
REVISED HELP FILE – The Help File has been re-written, is comprehensive and includes external hyperlinks to my YouTube channel videos about eclipse subjects. There are over 3 hours of custom eclipse video content including some of my original research.
LOAD SAVED ECLIPSE DATA - Saved eclipse data coordinates can now be loaded from the file.

- Contact times and max eclipse countdowns.
- Partial Phase Image Sequence Calculator.
- Announcement and notification practice session.
- Automatic geolocation.
- Contact Time Adjust buttons for the Lunar Limb Profile corrections
- Save eclipse site data as a file with additional fields to enter custom notes.

This App Is Ad Free!


We are NOT liable for misuse of the app causing inaccurate timing or the lack of eye safety precautions during the observation of a solar eclipse.

The "glasses off" and "glasses on" statements are a guide based on the calculated contact times. The timing can be affected by your phone's clock and the shape of the shadow due to the edge of the lunar limb. Lunar limb adjustment times for every point on the path are available on the internet. You are responsible for using the Adjust buttons to enter corrected times. Glasses should be ON if it's bright!

What’s New

Version 2.1

In-App purchases for future eclipses up to 2024.
Partial Eclipse Timing Mode - Time the eclipse when out of the path.
App Tutorial Video - Has a built-in 9 minute app tutorial.
Device Sound Check Tests - Built in test for device audio and notification settings.
New Eclipse Practice Video - New and improved practice video.
New Announcements - Additional and improved announcements.
Revised Help File – Now includes hyperlinks to my YouTube channel eclipse educational videos.
New User Interface – Select A Task screen and information dialogue boxes guide using the app.
Load Saved Eclipse Location Data – Ability to load coordinate data from your saved eclipse data.

Internationally Localized for a Complete Spanish Version

Ratings and Reviews

4.2 out of 5
291 Ratings

291 Ratings

Colb20130210 ,

No voice, followed directions

Saw this on SmarterEveryDay, and used it for the 2017 eclipse in Oregon. Well done. But the voice never came on. I saw ticker tape messages, which were great, but despite following all instructions on my iPhone SE (mute off, volume up, all notifications enabled, this app only one running after restarting it) I got no voice prompts. The only thing I did that might (but shouldn't) have caused an issue was switching to camera and back to this app.

The word "Stop" does not look like a button, rather just plain title text, so it took me a long time to figure out I could tap it.

The main screen has to scroll (not obvious) so the critical Check Position button (which DOES look like a button unlike the Stop "button") is hidden off the bottom of the screen, so you just stair at the main screen wondering what to do with a dead timer app.

The "Check Position" button leads to another counterintuitive screen where you "Get My Location" (that sounds different than "check location") and "Calculate Contact Tines"). Why do I have to press these manually? Can't the contact times update automatically? It feels clunky, like Excel with auto calculate turned off. Further, I have to "Load Contact Times". Load from a disk drive? How about "apply" or "use"? The terminology on the page is a bit confusing.

I love the developer's engagement and contribution to science. I look forward to improvements, and of course 2024.

Developer Response ,

Thanks for your comment. You points are noted and I am making a list of things to do to improve the next version.

RGP002 ,

Great app, very accurate

Like many others, I saw the app and Dr Telepun with Destin on SED, and downloaded immediately. I didn't do a ton of advance work, but did familiarize myself with the functionality for thirty minutes and a few practice runs, and corrected the times for lunar limb profile at my location. I don't know how difficult that would be to integrate into the app, but allowing the calculation to occur as an option within the app would be nice -- although there are websites that do most of the heavy lifting on the calculation now anyway. On the day of the eclipse, I used a Bluetooth earbud to hear the vocal cues, and kept my eyes in the sky (and my kids). Great app, very accurate with the times once corrected -- which was very easy to do. Helpful verbal reminders, too.

I found the app very easy to use, and sufficiently comprehensive if a bit utilitarian. But as an engineer, utilitarian is as much a complement as comprehensive is. You might not confuse the GUI for a pretty Apple produced piece of software, but it's every bit as functional as one.

I was in Chile earlier this year -- and having an app like this at least makes me think about wanting to go back for the eclipse in 2019. Good work to the developer and team. Apps like this are the fantastic part about the smartphone world we live in.

Developer Response ,

Thank you for your thoughtful review! I am happy the app helped you with the eclipse! I will be updating the elements for the upcoming eclipses including Chile. I am happy that you did corrections for lunar limb adjustments, the vast majority of users would not. But I believe I have the only app out that there that even discusses it and then provides the adjust ability to the contact times to correct for it. I don't think I will be able to provide the function to have the times corrected automatically. Even Xavier Jubier, who has done extensive work on this subject does not include it in his bass calculations, he provides the data separately for those who want to adjust. I am beginning a list of things that I will do to improve the app in Version 2. Thanks again!

Gradyap ,

Fantastic app!

I got this app after watching Smarter Every Day. I am so glad I did! After locking in my GPS coordinates, it took care of all of the alerts for me as well as the 20 or so people standing nearby as we were watching the eclipse.

A couple of notes for the developer:
1) the timing seemed to be slow by about 2-3 seconds. Meaning that totality through my glasses seemed to begin about 2-3 seconds before the app announced it. I know my coordinates were good but I am also fully aware that the clock on my phone could have been off or that my own perception could have been off. In any case, I'd rather leave my glasses on for a couple of extra seconds than take them off and burn my eyes!

2) Man, it took me a while to figure out how to use the app. I saw the extensive read me file but it took a second watching of the Smarter Every Day video to figure out the "dummy" 2 step process. Maybe for 2024 the app could come with a quick how-to video. That explains the features and use.

All in all a fantastic app that completely transformed my viewing experience and kept me informed about what was going on without requiring me to ever look away from the action! Well done, developer!

Developer Response ,

Thanks for your comment! The formula is accurate to 0.2 of a second. If you saw some differences it was probably due tot he effect of the lunar limb profile. At certain areas of the path it can affect it by +/- 3 seconds.


Foxwood Astronomy, LLC.
146.3 MB
Photo & Video

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Spanish

Age Rating
Rated 4+
© 2017-2019 Gordon Telepun
In-App Purchases
  1. Total - 7/2/19; Chile, Argenti $1.99
  2. Total – 4/8/24; USA, Mexico $1.99
  3. Total - 12/14/20; Chile, Argen $1.99


  • Family Sharing

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

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