# SoHO Viewer vs Project Planet Space

The clearest difference is update cadence: SoHO Viewer at every 2 months against Project Planet Space's every 25 months. SoHO Viewer also leads on iOS requirement (13.0 vs 15.0). On price, ads, 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.

SoHO Viewer ships an update every 2 months, Project Planet Space every 25 months. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SoHO Viewer | Project Planet Space |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (19 ratings)](https://appshunter.io/ios/app/soho-viewer/id356679615/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 69.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 25 months |
| Monetization | Free | — |
| Size | 5 MB | 2 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jérôme Diaz](https://appshunter.io/developer/334987620) | [Miroslav Hanzelka](https://appshunter.io/developer/1653768748) |

## 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


### Project Planet Space

[App page](https://appshunter.io/ios/app/project-planet-space/id6499347273)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SoHO Viewer free?

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

### Is Project Planet Space free?

Project Planet Space is free to download, with no in-app purchases.

### Do SoHO Viewer or Project Planet Space have ads?

Neither SoHO Viewer nor Project Planet Space shows ads.

### Which is updated more often, SoHO Viewer or Project Planet Space?

SoHO Viewer ships an update every 2 months, and Project Planet Space every 25 months. Most recently, SoHO Viewer was updated on October 13, 2026 and Project Planet Space on September 30, 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.*