# SDO Viewer vs Solar System&Celestial Objects

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.

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.

## The numbers

| Metric | SDO Viewer | Solar System&Celestial Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (6 ratings)](https://appshunter.io/ios/app/sdo-viewer/id913723111/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 62 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jérôme Diaz](https://appshunter.io/developer/334987620) | [NIKI TECH](https://appshunter.io/developer/1788609104) |

## What reviewers say

### SDO Viewer

[App page](https://appshunter.io/ios/app/sdo-viewer/id913723111)

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.

**Highlights:** Download SDO images, Display latest solar images, Push notifications for new images, Courtesy of NASA/SDO science teams

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar System&Celestial Objects

[App page](https://appshunter.io/ios/app/solar-system-and-celestial-objects/id6503188651)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SDO Viewer free?

SDO Viewer is free to download, with no in-app purchases.

### Is Solar System&Celestial Objects free?

Solar System&Celestial Objects is free to download, with no in-app purchases.

### Do SDO Viewer or Solar System&Celestial Objects have ads?

Solar System&Celestial Objects shows ads; SDO Viewer does not.

### Which is updated more often, SDO Viewer or Solar System&Celestial Objects?

SDO Viewer ships an update every 2 months, and Solar System&Celestial Objects every 6 weeks. Most recently, SDO Viewer was updated on November 1, 2026 and Solar System&Celestial Objects on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*