# JMARS AR Viewer vs Mars Terraforming Project

The clearest difference is in-app purchases: JMARS AR Viewer at none against Mars Terraforming Project's 2. JMARS AR Viewer also leads on rating (5.0 vs 4.6). Mars Terraforming Project's advantage is update cadence (daily vs monthly). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Mars Terraforming Project sells 2 in-app purchases, starting at $4.99 per month. JMARS AR Viewer asks for nothing beyond the download.

JMARS AR Viewer holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 3 and 5 respectively.

JMARS AR Viewer ships an update monthly, Mars Terraforming Project daily. Both last shipped on October 24, 2026.

## The numbers

| Metric | JMARS AR Viewer | Mars Terraforming Project |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/jmars-ar-viewer/id1501733717/reviews)** | [4.6 (5 ratings)](https://appshunter.io/ios/app/mars-terraforming-project/id6738961017/reviews) |
| Number of ratings | 3 | **5** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | **Free** | Freemium |
| Size | 272 MB | 42 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Robert Likamwa](https://appshunter.io/developer/1436236590) | [Madhanrajan Varadharajan](https://appshunter.io/developer/1047714662) |

## What reviewers say

### JMARS AR Viewer

[App page](https://appshunter.io/ios/app/jmars-ar-viewer/id1501733717)

Explore planetary surfaces in augmented reality using immersive 3D terrain models. Access datasets for celestial bodies like the Moon, Mars, and Earth. Prepare custom scenes in the desktop version for an enhanced AR experience.

**Highlights:** Augmented Reality exploration, 3D terrain visualization, Access to planetary datasets, Custom scene preparation, Moon, Mars, Earth data

**Features:** macOS Compatibility

**In-app purchases:** none


### Mars Terraforming Project

[App page](https://appshunter.io/ios/app/mars-terraforming-project/id6738961017)

Explore the science and engineering behind colonizing Mars. Engage in AI-driven narrative adventures that adapt to your choices, offering a unique way to learn about transforming the Red Planet into a habitable world.

**Highlights:** A-Z step-by-step terraforming tutorials, AI-generated D&D style Mars games, Customizable AI game prompts and actions, Educational content on science and engineering, Narrative-driven space adventures

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro Monthly | $4.99 | per month |
| Unlock the annual pro access | $19.99 | per year |


## Frequently asked questions

### Is JMARS AR Viewer free?

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

### Is Mars Terraforming Project free?

Mars Terraforming Project is free to download, with in-app purchases available.

### Which has better reviews, JMARS AR Viewer or Mars Terraforming Project?

JMARS AR Viewer is rated higher. JMARS AR Viewer averages 5.0 out of 5 from 3 ratings, while Mars Terraforming Project averages 4.6 from 5 ratings.

### Do JMARS AR Viewer or Mars Terraforming Project have ads?

Neither JMARS AR Viewer nor Mars Terraforming Project shows ads.

### Which is updated more often, JMARS AR Viewer or Mars Terraforming Project?

JMARS AR Viewer ships an update monthly, and Mars Terraforming Project daily. Most recently, JMARS AR Viewer was updated on October 24, 2026 and Mars Terraforming Project on October 24, 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.*