Comparison

SoHO Viewer vs ASGuide

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

Head to head
About

SoHO Viewer

Access and view the latest images from the Solar and Heliospheric Observatory (SoHO). Receive push notifications when new images are available, keeping you updated on solar activity. This app is a convenient tool for anyone interested in space imagery.

Highlights
  • Download latest SoHO images
  • Display solar images
  • Push notifications for new images
  • Badge notification for new images
  • Image courtesy of SOHO consortium
Features
Read full description

SoHO Viewer is a simple application for downloading and displaying the latest images taken by the Solar and Heliospheric Observatory (SoHO). It includes push notifications so you can be notified by a badge on the application when new images are available. It was quoted as “one of the ten best free applications to have on your iphone if you like stargazing:” http://www.networkworld.com/news/2010/112210-free-iphone-stargazing-apps.html It appears in Mars 2015 edition of Sky And Telescope, page 70. Images are courtesy of SOHO consortium. SOHO is a project of international cooperation between ESA and NASA. If you had like to see images taken by Solar Dynamics Observatory (SDO) please use the SDO Viewer application.

About

ASGuide

Explore the night sky with this astronomy companion. Discover planets, galaxies, nebulae, and more visible from your location. Generate custom viewing lists and preview celestial objects with an interactive sky atlas.

Highlights
  • Discover celestial objects visible from your location
  • Generate custom viewing lists
  • View detailed observation information
  • Interactive sky atlas preview
  • Dark mode for nighttime viewing
  • Sunrise/sunset and moon phase dashboard
Features
Read full description

Discover the wonders visible in your sky tonight. ASGuide (Astronomy Sky Guide) turns your location and observing time into a personal guide to the night sky. Discover visible planets, galaxies, nebulae, stars, star clusters, and galactic regions. Plan an observation, explore from home, or find your next celestial target. Find objects worth viewing and learn more about every discovery: - See what is visible from your location and when to observe it. View rise, transit, and set times. - Filter by magnitude, altitude above the horizon, constellation, object type, and more. - Search by common name, catalog number, constellation, object type, or detailed classification. - Browse the solar system and deep-sky categories. - Return quickly to recent searches and recently viewed objects. - See which planets are visible. - Save favorite objects for future viewing. - Use your current location or select any location on Earth. - Check sunrise, sunset, twilight, and night times. - Follow the current moon phase, illumination, moonrise, moonset, and the next new and full moons. - Open high-resolution imagery and explore objects with the interactive sky atlas. Customize the Home screen with the information that matters to you. Use the dark appearance for nighttime observations, or the standard iOS appearance. Your next night-sky discovery starts with ASGuide.

Screenshots

SoHO Viewer4 screens
ASGuide4 screens

Verdict

The call

The clearest difference is rating: ASGuide at 4.8 against SoHO Viewer's 3.4. ASGuide also leads on review sentiment (100% vs 69%). SoHO Viewer's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, ratings volume, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ASGuide holds the better App Store score, 4.8 against 3.4. Both are backed by a comparable volume of ratings — 19 and 9 respectively. Written reviews point the same way: 69% of SoHO Viewer's written reviews are positive against 100% of ASGuide's.

UpkeepUpdate frequency

SoHO Viewer ships an update every 2 months, ASGuide every 4 months. The most recent releases landed on July 21, 2026 and September 1, 2026 respectively.

Scorecard4 real differences · 6 level
SoHO Viewer versus ASGuide: the parameters behind the verdict, then further details
ParameterSoHO ViewerASGuide
PriceFreeFree
Rating3.4 (19 ratings)4.8 (9 ratings) — better
Positive reviews69.1% of reviews100.0% of reviews — better
Number of ratings19 — better9
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size5 MB33 MB
Age rating4+4+
DeveloperJerome DiazPhilip Perez

Customer experience

SoHO Viewer

All ratings19 ratings
Positive57.9%
Neutral5.3%
Negative36.8%
Written reviews68 reviews
Positive69.1%
Neutral10.3%
Negative20.6%

ASGuide

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SoHO Viewer

No in-app purchases

None

ASGuide

No in-app purchases

Questions

Is SoHO Viewer free?
SoHO Viewer is free to download, with no in-app purchases.
Is ASGuide free?
ASGuide is free to download, with no in-app purchases.
Which has better reviews, SoHO Viewer or ASGuide?
ASGuide is rated higher. SoHO Viewer averages 3.4 out of 5 from 19 ratings, while ASGuide averages 4.8 from 9 ratings.
Do SoHO Viewer or ASGuide have ads?
Neither SoHO Viewer nor ASGuide shows ads.
Which is updated more often, SoHO Viewer or ASGuide?
SoHO Viewer ships an update every 2 months, and ASGuide every 4 months. Most recently, SoHO Viewer was updated on July 21, 2026 and ASGuide on September 1, 2026.

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