# SDO Viewer vs Muon Tracker

The clearest difference is price: SDO Viewer at Free against Muon Tracker's $1.99. SDO Viewer also leads on ratings volume (5 vs 1) and iOS requirement (13.0 vs 16.6). Muon Tracker's advantage is rating (5.0 vs 3.0). On ads, in-app purchases and device support there is nothing between them.

SDO Viewer is free to download; Muon Tracker costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Muon Tracker holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: SDO Viewer has 5 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | SDO Viewer | Muon Tracker |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.0 (5 ratings)](https://appshunter.io/ios/app/sdo-viewer/id913723111/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/muon-tracker/id6745190290/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | **Free** | Paid |
| Size | 6 MB | 1 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jerome Diaz](https://appshunter.io/developer/334987620) | [Arpacore B.V.](https://appshunter.io/developer/1441928570) |

## 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


### Muon Tracker

[App page](https://appshunter.io/ios/app/muon-tracker/id6745190290)

Simulates the detection of high-energy muons from cosmic rays, visualizing their paths and energy in real-time. Explore particle physics and cosmic radiation with location-based data and exportable logs.

**Highlights:** Simulates cosmic muon detection, Visualizes muon tracks in 3D, Real-time rate and flux display, Location-based data and altitude adjustment, Exportable event logs (CSV), Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SDO Viewer free?

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

### Is Muon Tracker free?

Muon Tracker costs $1.99, with no in-app purchases.

### Which has better reviews, SDO Viewer or Muon Tracker?

Muon Tracker is rated higher. SDO Viewer averages 3.0 out of 5 from 5 ratings, while Muon Tracker averages 5.0 from 1 ratings.

### Do SDO Viewer or Muon Tracker have ads?

Neither SDO Viewer nor Muon Tracker shows ads.

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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.*