# SoHO Viewer vs Hubble Space Telescope Tracker

The clearest difference is review sentiment: SoHO Viewer at 69% against Hubble Space Telescope Tracker's 0%. SoHO Viewer also leads on rating (3.4 vs 1.0) and in-app purchases (none vs 1). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Hubble Space Telescope Tracker sells 1 one-off in-app purchase. SoHO Viewer asks for nothing beyond the download.

SoHO Viewer holds the better App Store score, 3.4 against 1.0. That said, the two scores are not equally well evidenced: SoHO Viewer has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 69% of SoHO Viewer's written reviews are positive against 0% of Hubble Space Telescope Tracker's.

SoHO Viewer ships an update every 2 months, Hubble Space Telescope Tracker every 3 months. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SoHO Viewer | Hubble Space Telescope Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (19 ratings)](https://appshunter.io/ios/app/soho-viewer/id356679615/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/hubble-space-telescope-tracker/id6468819172/reviews) |
| Number of ratings | **19** | 2 |
| Positive reviews | **69.1% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 72 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) | [KAKHA GIORGASHVILI](https://appshunter.io/developer/1501353984) |

## What reviewers say

### SoHO Viewer

[App page](https://appshunter.io/ios/app/soho-viewer/id356679615)

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:** macOS Compatibility

**In-app purchases:** none


### Hubble Space Telescope Tracker

[App page](https://appshunter.io/ios/app/hubble-space-telescope-tracker/id6468819172)

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.

**Highlights:** Real-time mission progress, Image gallery, Discussion forums, Notifications for new images, 3D Solar system model, Ask an Astronomer feature

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | one-time |


## Frequently asked questions

### Is SoHO Viewer free?

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

### Is Hubble Space Telescope Tracker free?

Hubble Space Telescope Tracker is free to download, with in-app purchases available.

### Which has better reviews, SoHO Viewer or Hubble Space Telescope Tracker?

SoHO Viewer is rated higher. SoHO Viewer averages 3.4 out of 5 from 19 ratings, while Hubble Space Telescope Tracker averages 1.0 from 2 ratings.

### Do SoHO Viewer or Hubble Space Telescope Tracker have ads?

Hubble Space Telescope Tracker shows ads; SoHO Viewer does not.

### Which is updated more often, SoHO Viewer or Hubble Space Telescope Tracker?

SoHO Viewer ships an update every 2 months, and Hubble Space Telescope Tracker every 3 months. Most recently, SoHO Viewer was updated on October 21, 2026 and Hubble Space Telescope Tracker on October 12, 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.*