SDO Viewer vs Solar System&Celestial Objects
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.
Solar System&Celestial Objects
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Easy learning about solar system, stars, celestial objects, constellations, spacecraft with pictures ,sounds and quiz games. If you who always search and learn a quiz app like these, this app is for you ① Solar system Flash card app. ② Stars Quiz app. ③ Celestial objects quiz app. ④ Stars history and information app. ⑤ Constellations name cards. ⑥ Guess solar system app. Features: - You can learn many kinds of stars. - You can play solar system quiz. - Many information related to solar system, stars, celestial objects, constellations, spacecraft - Support Quiz feature. - Support 5 languages: English, Japanese, Korean, Chinese, Vietnamese
Screenshots
Verdict
The clearest difference is ads: SDO Viewer at none against Solar System&Celestial Objects's shown. On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
SDO Viewer ships an update every 2 months, Solar System&Celestial Objects every 6 weeks. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.
| Parameter | SDO Viewer | Solar System&Celestial Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (6 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | Jérôme Diaz | NIKI TECH |
In-app purchases
SDO Viewer
No in-app purchases
Solar System&Celestial Objects
No in-app purchases
Questions
Is SDO Viewer free?
Is Solar System&Celestial Objects free?
Do SDO Viewer or Solar System&Celestial Objects have ads?
Which is updated more often, SDO Viewer or Solar System&Celestial Objects?
Other comparisons
