# Mars vs Sentry Defenses

The clearest difference is rating: Sentry Defenses at 5.0 against Mars's 4.1. Sentry Defenses also leads on in-app purchases (none vs 3) and ads (none vs shown). Mars's advantage is ratings volume (26 vs 5). On price and device support there is nothing between them.

Both are free to download. Mars sells 3 one-off in-app purchases. Sentry Defenses asks for nothing beyond the download.

Sentry Defenses holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Mars has 26 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 66% of Mars's written reviews are positive against 100% of Sentry Defenses's.

## The numbers

| Metric | Mars | Sentry Defenses |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (26 ratings)](https://appshunter.io/ios/app/mars-the-arrival/id1458927524/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/sentry-defenses/id1581116965/reviews)** |
| Number of ratings | **26** | 5 |
| Positive reviews | 65.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2.6 GB | 62 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Nyul](https://appshunter.io/developer/1458927523) | [GetSentry LLC](https://appshunter.io/developer/1173474703) |

## What reviewers say

### Mars

[App page](https://appshunter.io/ios/app/mars-the-arrival/id1458927524)

Engage in a scientific simulation of establishing a Mars colony. Manage a small group of settlers, research technologies, and build a thriving settlement from a single module. Compete with other human-controlled colonies for success on the Red Planet.

**Highlights:** Scientific Mars settlement simulation, Research and development of technologies, Exploration of the Red Planet, Building and managing specialized structures, Managing settler types and life cycles, 3D view of settlement and Mars surface, Offline playability

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Logistics contract | $0.99 | one-time |
| MAA Gold Membership | $1.99 | one-time |
| Sponsors contract | $2.99 | one-time |


### Sentry Defenses

[App page](https://appshunter.io/ios/app/sentry-defenses/id1581116965)

Defend your golden turd from incoming bugs by strategically placing Sentry towers. Earn coins each turn to upgrade your defenses and survive waves of software-inspired enemies. This game playfully represents real-life software bugs found in popular crash reporting tools.

**Highlights:** Strategic tower placement, Upgrade defenses with earned coins, Defend against software bug enemies, Progressive survival turns, Unique theme based on crash reporting

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mars free?

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

### Is Sentry Defenses free?

Sentry Defenses is free to download, with no in-app purchases.

### Which has better reviews, Mars or Sentry Defenses?

Sentry Defenses is rated higher. Mars averages 4.1 out of 5 from 26 ratings, while Sentry Defenses averages 5.0 from 5 ratings.

### Do Mars or Sentry Defenses have ads?

Mars shows ads; Sentry Defenses does not.

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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.*