SDO Viewer vs Hubble Space Telescope Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SDO Viewer
Access and view the latest images from the Solar Dynamics Observatory. Receive push notifications when new images become available, keeping you updated on solar activity.
- Download SDO images
- Display latest solar images
- Push notifications for new images
- Courtesy of NASA/SDO science teams
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SDO Viewer is a simple application for downloading and displaying the latest images taken by the Solar Dynamics Observatory (SDO). It includes push notifications so you can be notified by a badge on the application when new images are available. SDO Viewer, by the creator of SoHO Viewer. Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
Hubble Space Telescope Tracker
Follow NASA's Hubble Space Telescope mission in real time. Explore a gallery of stunning images, engage in discussions, and learn about space. Receive notifications for new discoveries and test your knowledge with quizzes.
- Real-time mission progress
- Image gallery
- Discussion forums
- Notifications for new images
- 3D Solar system model
- Ask an Astronomer feature
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With Hubble Space Telescope Tracker app, you can follow the mission's progress in real time. Check out the latest images in the gallery and discuss topics in the discussions. Receive notifications about new images. App offers - First Images - Live information - Image Gallery - Discussion - Ask an Astronomer - Frequently Asked Questions - Quiz - Wallpapers - 3D Solar system What is Hubble Space Telescope? The Hubble Space Telescope is a powerful space-based observatory launched in 1990. It captures detailed images of distant galaxies and celestial objects in visible, ultraviolet, and infrared light. Positioned above Earth's atmosphere, it provides clear, distortion-free views, leading to groundbreaking discoveries in astronomy. Operated jointly by NASA and ESA, Hubble has significantly expanded our understanding of the universe.
Screenshots
Verdict
The clearest difference is review sentiment: SDO Viewer at 60% against Hubble Space Telescope Tracker's 0%. SDO Viewer also leads on rating (3.0 vs 1.0) and in-app purchases (none vs 1). On price, ratings volume, update cadence 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
Both are free to download. Hubble Space Telescope Tracker sells 1 one-off in-app purchase. SDO Viewer asks for nothing beyond the download.
SDO Viewer holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 60% of SDO Viewer's written reviews are positive against 0% of Hubble Space Telescope Tracker's.
SDO Viewer ships an update every 2 months, Hubble Space Telescope Tracker every 3 months. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.
| Parameter | SDO Viewer | Hubble Space Telescope Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (5 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 60.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Jerome Diaz | KAKHA GIORGASHVILI |
Customer experience
SDO Viewer
Hubble Space Telescope Tracker
In-app purchases
SDO Viewer
No in-app purchases
Hubble Space Telescope Tracker
- Premium$2.99
Questions
Is SDO Viewer free?
Is Hubble Space Telescope Tracker free?
Which has better reviews, SDO Viewer or Hubble Space Telescope Tracker?
Do SDO Viewer or Hubble Space Telescope Tracker have ads?
Which is updated more often, SDO Viewer or Hubble Space Telescope Tracker?
Other comparisons
