# Crush Depth vs Mars47

The clearest difference is review sentiment: Crush Depth at 100% against Mars47's 0%. Mars47's advantage is update cadence (every 9 days vs every 85 months). 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.

Crush Depth ships an update every 85 months, Mars47 every 9 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Crush Depth | Mars47 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/crush-depth/id508453153/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 85 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 271 MB | 559 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Satish Mahalingam](https://appshunter.io/developer/508453156) | [BENJAMIN HEIDGER](https://appshunter.io/developer/1767910831) |

## What reviewers say

### Crush Depth

[App page](https://appshunter.io/ios/app/crush-depth/id508453153)

Defend your underwater base from incoming enemy submarines in this strategic game. Build and manage your defenses to survive waves of attacks.

**Highlights:** Build defenses, Protect your base, Defend against submarines, Strategic gameplay, Underwater combat

**Features:** macOS Compatibility

**In-app purchases:** none


### Mars47

[App page](https://appshunter.io/ios/app/mars47-spaceport/id6794476291)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Crush Depth free?

Crush Depth is free to download, with no in-app purchases.

### Is Mars47 free?

Mars47 is free to download, with no in-app purchases.

### Do Crush Depth or Mars47 have ads?

Neither Crush Depth nor Mars47 shows ads.

### Which is updated more often, Crush Depth or Mars47?

Crush Depth ships an update every 85 months, and Mars47 every 9 days. Most recently, Crush Depth was updated on October 23, 2026 and Mars47 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.*