SoHO Viewer vs ASGuide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Download latest SoHO images
- Display solar images
- Push notifications for new images
- Badge notification for new images
- Image courtesy of SOHO consortium
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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.
ASGuide
Explore the night sky with a personal guide to visible planets, galaxies, and stars. Plan observations, find celestial targets, and learn about discoveries with detailed information and an interactive atlas. Customize your view for nighttime use.
- Identify visible planets, galaxies, and stars
- Plan observation times and celestial targets
- Filter objects by magnitude and altitude
- Search by common name or catalog number
- Browse solar system and deep-sky objects
- Track moon phases and times
- Interactive sky atlas with high-resolution imagery
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
SoHO Viewer ships an update every 2 months, ASGuide every 4 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | SoHO Viewer | ASGuide |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (19 ratings) | 4.8 (9 ratings) — better |
| Positive reviews | 69.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 19 — better | 9 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Jérôme Diaz | Philip Perez |
Customer experience
SoHO Viewer
ASGuide
Bugs and requests
SoHO Viewer
Reported bugs
17 issues- System goes down during solar max
- App is all blacked out
- App has one still image that shows absolute zero
- App stopped updating
- Latest update is a fail, app crashes
Show 12 moreShow fewer
- Images from SoHo viewer not downloading
- App not updating any images
- App won't update pictures past a certain date
- Images do not update
- App is not updating any more
- App not updating
- EIT views have lagged by almost a week
- App won't update no more
- Application not working after last update
- Will not update
- App crashes after 15 seconds
- App not working
Requested features
15 requests- Access to archives
- Add video sequences
- Add H Alpha shots
- Add more information (e.g., solar wind)
- Add zoom function
Show 10 moreShow fewer
- Add close-ups of active regions
- Move masking images to end/beginning
- Add description under each pic (filter, description, UV)
- Add links to 'pic of the week'
- Make it more navigable
- Needs video for reference, like weather radar
- Video clip/slideshow of last N frames
- Automatic save function with frequency setting
- Update iOS for better efficiency
- Update to run more efficiently on phone and iPad
ASGuide
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SoHO Viewer
No in-app purchases
ASGuide
No in-app purchases
