Comparison

Solar Eclipse Timer vs Kōlab

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Solar Eclipse Timer

This app provides precise countdowns and reminders for solar eclipse phenomena, aiding both casual observers and photographers. It works offline and offers features like automatic partial-phase image timing and a dedicated photographer mode.

Highlights
  • Offline eclipse timing
  • Precise contact time calculation
  • Photographer mode
  • Automatic partial-phase image timing
  • Geolocation and manual coordinate entry
  • Audio and notification tests
Features
Read full description

The Solar Eclipse Timer app is marking its 6th eclipse since 2017, which speaks volumes about its reliability and the trust it has built within the eclipse-chasing community. Helping tens of thousands of people enjoy the eclipse more by being reminded to observe all the fascinating eclipse phenomena. Photographers are aided by down-to-the-second precision and countdowns. Since the 2026 path covers some remote areas as well as high-traffic spots in Spain where cell service could be overwhelmed on eclipse day, the app works offline once unlocked. So, geolocation and contact time calculation are all done within the app. This makes it a true "field tool." The app is free to try, and for only a $1.99 in-app purchase to unlock the 2026 eclipse, it's an easy "yes" for anyone who has invested time and travel to be in the path of totality. In-App Video Tutorial: The first button on the Home Screen provides a comprehensive tutorial that explains all the app's functions and how to use them effectively. Audio and Notification Tests: The second button lets users run a "device sound check" to confirm that audio cues, spoken timings, and notifications are audible, which is critical since the app is designed to talk to you. Practice Session Video: The third button launches a 4-minute-45-second video of my actual eclipse-day observation site in 2024, synchronized with the app's real-time announcements. This allows both observers and photographers to practice their routines repeatedly, such as observing for shadow bands, adjusting shutter speeds, and knowing when to remove solar filters. Additionally, dialogue boxes appear as functions are selected, giving you more guidance. On eclipse day, after you get into the path, you can be timing the eclipse in 3 easy steps: 1. Tap to geolocate. 2. Tap to have the app calculate the precise contact times. 3. Tap to load the times into the timer. That's it! You are timing the eclipse. A major convenience feature of the app is the automatic calculation of the clock times needed to capture a perfect set of partial-phase images before and after totality. It is the only app in the world with this function. Collaborating with the late Fred Espenak (Mr. Eclipse) on Photographers Mode before the 2024 eclipse gives the app an incredible pedigree. For pros who need to stay "in the zone" and only care about timing and countdowns from C1 through C4, this mode is a game-changer. You can manually enter coordinates and save the site as a file. This helps compare multiple potential viewing locations. The app includes a hyperlink to the Solar Eclipse Timer website, which gives access to downloadable worksheets to record your partial-phase image times or the chores you want to do in Photographers mode, as well as my Master Stop Chart to count full and partial camera stops. I have observed and photographed six total solar eclipses and one annular eclipse. The concept of an eclipse “talking” timer was developed by me in 2002. I have been helping people time eclipses for almost 25 years. When you use the app, you will appreciate that it was designed by an eclipse chaser. There is also a link to learn more about my comprehensive eclipse observation and photography book, now in its second edition, titled “Eclipse Day.” The app also has a partial eclipse timing mode. This app is ad-free and does not track any user data. ALWAYS USE EYE PROTECTION DURING THE PARTIAL PHASES OF A SOLAR ECLIPSE! OR EVEN WHEN IT IS BRIGHT! NOT DOING SO CAN CAUSE EYE DAMAGE! 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 guides 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. Use the Adjust buttons for Lunar Limb variation time adjustments. Glasses should be ON if it's bright!

About

Kōlab

This app fosters a collaborative environment for photographers to improve their skills through creative challenges and personalized feedback. It focuses on specific disciplines like aviation and landscape, offering a community-driven approach to artistic growth without algorithmic interference.

Highlights
  • Weekly creative missions
  • Personalized technique feedback
  • Real collaboration with other photographers
  • Discipline-specific communities
  • High-resolution image sharing
  • Growth tracking with XP and levels
Features
Read full description

Kōlab is a photography app built on one idea: your best shots come from practice and feedback, alongside other photographers who care as much as you do. Find a Mission, add your shot and see what other photographers made of the same brief. Then add a new version when want you take it further! • HOW IT WORKS Missions A new brief every week, built around a technique, challenge or event. Follow the ones you like the look of, add a shot when you've got it ready. Comments from people who shoot Kōlab looks at every shot and suggests specific things another photographer could say about it, rather than "nice shot"! Feedback Rooms When you want some proper feedback on a shot, open a Feedback Room. These are private conversations that only those in the room can see. Help other photographers out by joining other photographers feedback rooms too! Edit Reveal Put the unedited image next to the finished shot. Drag the slider and show every creative decision that got made on the way. Versions Re-edit, re-crop or reshoot a photo you have already posted, add it as a version, and say what changed. Both stay on the same post and anyone can swipe between them. Something back about your own work Open the app and you might discover something new about your photography: your fastest shutter speed yet, a personal best, or a shot that stands apart from everything else you've shot before. A feed built around you Kōlab's For You feed leans towards the genres and the photographers you care about, and it makes room for great shots nobody has commented on yet. Shots at full quality Upload high-resolution, uncropped, unlimited images. Your work shows up the way you meant it to. • WHAT MAKES KŌLAB DIFFERENT - Missions give you a reason to go out shooting or editing - One shot has many creative options. Add a version whenever you take it further - Private Feedback Rooms when you want honest critique - No feed ranked by popularity, and no follower counts to chase - Your photographs are never used to train generative AI image models - Built by photographers, for photographers • WHO IS KŌLAB FOR Photographers who want to get better, and would rather do it around people who get it. Whether you are a dawn-chasing wildlife photographer, a weekend plane spotter or an all-weather landscape photographer, this is built for you. Aviation, landscape and wildlife are the busiest genres today. Every other genre is open and filling up, and getting in early means you help shape the community. Come and see what your photography does when it has somewhere to go. Terms of Use: https://kolab.social/terms Privacy Policy: https://kolab.social/privacy

Screenshots

Solar Eclipse Timer4 screens
Kōlab4 screens

Verdict

The call

The clearest difference is rating: Kōlab at 5.0 against Solar Eclipse Timer's 3.8. Kōlab also leads on in-app purchases (none vs 6) and review sentiment (100% vs 68%). Solar Eclipse Timer's advantage is ratings volume (560 vs 14) and device support (3 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Solar Eclipse Timer sells 6 one-off in-app purchases. Kōlab asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Kōlab holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Solar Eclipse Timer has 560 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 68% of Solar Eclipse Timer's written reviews are positive against 100% of Kōlab's.

UpkeepUpdate frequency

Solar Eclipse Timer ships an update monthly, Kōlab fortnightly. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 2 level
Solar Eclipse Timer versus Kōlab: the parameters behind the verdict, then further details
ParameterSolar Eclipse TimerKōlab
PriceFreeFree
Rating3.8 (560 ratings)5.0 (14 ratings) — better
Positive reviews68.4% of reviews100.0% of reviews — better
Number of ratings560 — better14
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size231 MB108 MB
Age rating17+12+
DeveloperFoxwood Astronomy, LLC.Kolab Social Ltd

Customer experience

Solar Eclipse Timer

All ratings560 ratings
Positive68.0%
Neutral4.3%
Negative27.7%
Written reviews158 reviews
Positive68.4%
Neutral7.6%
Negative24.1%

Kōlab

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Solar Eclipse Timer

Reported bugs

3 issues
  • App crashing when loading timing data
  • Notifications not working when camera is in use
  • Incorrect contact times displayed for some locations

Requested features

5 requests
  • Customizable reminders or timers
  • Automatic time zone and location updates
  • Lunar eclipse support
  • Improved onboarding and tutorial
  • Countdown timer with graphical depiction

Kōlab

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Solar Eclipse Timer

One-time6
  • Total - 7/2/19; Chile, Argenti$1.99
  • Total - 12/14/20; Chile, Argen$1.99
  • Total – 12/4/21; Antarctica$1.99
Show 3 more
  • Hybrid – 4/20/23; Australia$1.99
  • Total – 4/8/24; USA, Mexico$1.99
  • Solar Eclipse Timer$1.99
None

Kōlab

No in-app purchases

Questions

Is Solar Eclipse Timer free?
Solar Eclipse Timer is free to download, with in-app purchases available.
Is Kōlab free?
Kōlab is free to download, with no in-app purchases.
Which has better reviews, Solar Eclipse Timer or Kōlab?
Kōlab is rated higher. Solar Eclipse Timer averages 3.8 out of 5 from 560 ratings, while Kōlab averages 5.0 from 14 ratings.
Do Solar Eclipse Timer or Kōlab have ads?
Neither Solar Eclipse Timer nor Kōlab shows ads.
Which is updated more often, Solar Eclipse Timer or Kōlab?
Solar Eclipse Timer ships an update monthly, and Kōlab fortnightly. Most recently, Solar Eclipse Timer was updated on September 20, 2026 and Kōlab on September 24, 2026.

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