Comparison

Solar Eclipse Timer vs AstroShader

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

AstroShader

Capture, stack, and edit stunning astrophotography directly on your mobile device. This app streamlines the process by aligning and stacking images live during capture, eliminating the need for external software. Fine-tune your celestial images with a comprehensive suite of editing tools.

Highlights
  • Live image alignment and stacking
  • Manual focus control
  • Adjustable exposure, ISO, and white balance
  • Intervalometer for timed captures
  • Advanced image editing tools
  • Save in multiple formats including TIFF
Read full description

One-time purchase. No subscription. AstroShader is an astrophotography app for capturing, stacking and editing. All you need is a stand, tripod, telescope or rock (to lean your phone on). AstroShader lets you align and stack live during the image capture process. You can also align and stack images from you Photos library. No need to transfer images to a computer to align and stack them separately (but there is a built in intervalometer if you need it). To take an image follow these steps: • Use a stand, tripod, telescope mount (or lean your iPhone on a rock). • Zoom in on stars and set focus manually, or use autofocus. • Set the exposure time, ISO and white balance, or leave to auto-exposure. • Set the number of exposures to be automatically aligned and stacked. • Calibrate your images from the edit tools. • After the capture is complete you can edit and save your image—including as 16bit TIFF. • You can open images directly to use the edit tools in AstroShader - rather following a new image capture. Image capture options include: • Number of exposures to be aligned and stacked • Exposure time • ISO • White balance • Camera type • Countdown timer • Manual focus • Pause the capture to reposition iPhone or telescope Edit options include: • Stretch image • Background extraction • Dynamic background extraction (DBE) • x5 Histogram curves for fine tonal adjustment • x3 sharpen layers each with radius and intensity with layer blending rather than chaining • Brightness (low light enhancement) • Saturation • Black point • Temperature • Tint • Save format options; HEIF, PNG, JPEG, TIFF

Screenshots

Solar Eclipse Timer4 screens
AstroShader4 screens

Verdict

The call

The clearest difference is price: Solar Eclipse Timer at Free against AstroShader's $1.99. Solar Eclipse Timer also leads on ratings volume (560 vs 105) and device support (3 vs 1). AstroShader's advantage is in-app purchases (none vs 6) and rating (4.2 vs 3.8). On review sentiment, update cadence 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

Solar Eclipse Timer is free to download; AstroShader costs $1.99 up front. Solar Eclipse Timer sells 6 one-off in-app purchases. AstroShader asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AstroShader holds the better App Store score, 4.2 against 3.8. That said, the two scores are not equally well evidenced: Solar Eclipse Timer has 560 ratings behind it against 105, so its average is the more settled of the two. Written reviews complicate that: 68% of Solar Eclipse Timer's written reviews are positive against 61% of AstroShader's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Solar Eclipse Timer ships an update monthly, AstroShader every 3 weeks. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.

Scorecard8 real differences · 3 level
Solar Eclipse Timer versus AstroShader: the parameters behind the verdict, then further details
ParameterSolar Eclipse TimerAstroShader
PriceFree — better$1.99
Rating3.8 (560 ratings)4.2 (105 ratings) — better
Positive reviews68.4% of reviews — better61.5% of reviews
Number of ratings560 — better105
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#13 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better18.0
Further details — not scored
Size231 MB9 MB
Age rating17+4+
DeveloperFoxwood Astronomy, LLC.AstroShader Limited

Customer experience

Solar Eclipse Timer

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

AstroShader

All ratings105 ratings
Positive80.0%
Neutral8.6%
Negative11.4%
Written reviews109 reviews
Positive61.5%
Neutral14.7%
Negative23.9%

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

AstroShader

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

AstroShader

No in-app purchases

Questions

Is Solar Eclipse Timer free?
Solar Eclipse Timer is free to download, with in-app purchases available.
Is AstroShader free?
AstroShader costs $1.99, with no in-app purchases.
Which has better reviews, Solar Eclipse Timer or AstroShader?
AstroShader is rated higher. Solar Eclipse Timer averages 3.8 out of 5 from 560 ratings, while AstroShader averages 4.2 from 105 ratings.
Do Solar Eclipse Timer or AstroShader have ads?
Neither Solar Eclipse Timer nor AstroShader shows ads.
Which is updated more often, Solar Eclipse Timer or AstroShader?
Solar Eclipse Timer ships an update monthly, and AstroShader every 3 weeks. Most recently, Solar Eclipse Timer was updated on September 29, 2026 and AstroShader on October 1, 2026.

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