Comparison

Solar Eclipse Timer vs Spark Camera Control

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
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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

Spark Camera Control

Control your DSLR camera wirelessly from your smartphone or tablet. Capture photos, videos, and time lapses with instant feedback and creative control from up to 100 feet away.

Highlights
  • Wireless camera shutter control
  • Remote photo and video capture
  • Time lapse creation
  • Bulb ramping for sunsets
  • Long-range connectivity (up to 100')
  • BLE connectivity
Features
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This is the smartphone control app for Spark. Spark is a device that attaches to your DSLR camera (Canon, Nikon, Sony, Fujifilm, Olympus and others) and allows you to wirelessly take photos, videos and time lapses from your phone or tablet and get instant feedback. With Pulse you get complete creative control all while staying free to use your phone or tablet. Spark is the most versatile camera remote on the market. With three different modes of control, Spark was built to adapt to whatever situation you are shooting in. Whether you're taking a fun group photo, capturing a long exposure of the stars, or settling down and setting up a time lapse, Spark gives you instant control. With your phone or without it. Spark Features : -Wirelessly control your camera's shutter from up to 100' away -Take sunset timelapses with Bbulb ramping -Free up WiFi and Internet as Spark uses and BLE -Extend your session with 2,000 hours of battery (factory replaceable)

Screenshots

Solar Eclipse Timer4 screens
Spark Camera Control4 screens

Verdict

The call

The clearest difference is review sentiment: Solar Eclipse Timer at 68% against Spark Camera Control's 22%. Solar Eclipse Timer also leads on rating (3.8 vs 3.1) and ratings volume (560 vs 19). Spark Camera Control's advantage is in-app purchases (none vs 6). On price, update cadence, ads and device support 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. Spark Camera Control asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Solar Eclipse Timer holds the better App Store score, 3.8 against 3.1. That said, the two scores are not equally well evidenced: Solar Eclipse Timer has 560 ratings behind it against 19, 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 22% of Spark Camera Control's.

UpkeepUpdate frequency

Solar Eclipse Timer ships an update monthly, Spark Camera Control every 2 months. Both last shipped on October 7, 2026.

Scorecard6 real differences · 4 level
Solar Eclipse Timer versus Spark Camera Control: the parameters behind the verdict, then further details
ParameterSolar Eclipse TimerSpark Camera Control
PriceFreeFree
Rating3.8 (560 ratings) — better3.1 (19 ratings)
Positive reviews68.4% of reviews — better22.2% of reviews
Number of ratings560 — better19
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size231 MB35 MB
Age rating17+4+
DeveloperFoxwood Astronomy, LLC.Tangy Laboratories Inc

Customer experience

Solar Eclipse Timer

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

Spark Camera Control

All ratings19 ratings
Positive47.4%
Neutral10.5%
Negative42.1%
Written reviews18 reviews
Positive22.2%
Neutral11.1%
Negative66.7%

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

Spark Camera Control

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

Spark Camera Control

No in-app purchases

Questions

Is Solar Eclipse Timer free?
Solar Eclipse Timer is free to download, with in-app purchases available.
Is Spark Camera Control free?
Spark Camera Control is free to download, with no in-app purchases.
Which has better reviews, Solar Eclipse Timer or Spark Camera Control?
Solar Eclipse Timer is rated higher. Solar Eclipse Timer averages 3.8 out of 5 from 560 ratings, while Spark Camera Control averages 3.1 from 19 ratings.
Do Solar Eclipse Timer or Spark Camera Control have ads?
Neither Solar Eclipse Timer nor Spark Camera Control shows ads.
Which is updated more often, Solar Eclipse Timer or Spark Camera Control?
Solar Eclipse Timer ships an update monthly, and Spark Camera Control every 2 months. Most recently, Solar Eclipse Timer was updated on October 7, 2026 and Spark Camera Control on October 7, 2026.

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