# SDO Viewer vs Mars LTE

The clearest difference is rating: Mars LTE at 5.0 against SDO Viewer's 3.0. SDO Viewer's advantage is update cadence (every 2 months vs every 43 months) and ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mars LTE 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.

SDO Viewer ships an update every 2 months, Mars LTE every 43 months. The most recent releases landed on June 1, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | SDO Viewer | Mars LTE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (5 ratings)](https://appshunter.io/ios/app/sdo-viewer/id913723111/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mars-lte/id1623085876/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** | Every 43 months |
| Monetization | Free | Free |
| Size | 6 MB | 3 MB |
| Requires iOS | **13.0** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jerome Diaz](https://appshunter.io/developer/334987620) | [Taylan Atasoy](https://appshunter.io/developer/1204464263) |

## 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


### Mars LTE

[App page](https://appshunter.io/ios/app/mars-lte/id1623085876)

Explore Mars with detailed information about the Perseverance rover's mission. Learn about its search for ancient life, sample collection, and technology testing for future human exploration. Discover the Ingenuity helicopter's groundbreaking flight capabilities.

**Highlights:** Perseverance rover mission details, Search for ancient microbial life, Core sample collection and storage, Technology testing for human exploration, Ingenuity helicopter flight information

**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 Mars LTE free?

Mars LTE is free to download, with no in-app purchases.

### Which has better reviews, SDO Viewer or Mars LTE?

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

### Do SDO Viewer or Mars LTE have ads?

Neither SDO Viewer nor Mars LTE shows ads.

### Which is updated more often, SDO Viewer or Mars LTE?

SDO Viewer ships an update every 2 months, and Mars LTE every 43 months. Most recently, SDO Viewer was updated on June 1, 2026 and Mars LTE on June 7, 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.*