# Space Defender 3D vs Submarine Panic

The clearest difference is in-app purchases: Submarine Panic at none against Space Defender 3D's 1. Space Defender 3D's advantage is iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Space Defender 3D sells 1 one-off in-app purchase. Submarine Panic asks for nothing beyond the download.

Space Defender 3D ships an update every 4 days, Submarine Panic every 5 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Space Defender 3D | Submarine Panic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/submarine-panic/id6786455427/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | — | Free |
| Size | 126 MB | 64 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Barry Mitchell](https://appshunter.io/developer/1120747608) | [ai.doo](https://appshunter.io/developer/6773935210) |

## What reviewers say

### Space Defender 3D

[App page](https://appshunter.io/ios/app/space-defender-3d/id1547177052)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Adverts From Game | $1.99 | one-time |


### Submarine Panic

[App page](https://appshunter.io/ios/app/submarine-panic/id6786455427)

Experience a tense, procedural arcade survival game set in a Cold War submarine. Manage instruments like sonar, pressure gauges, and ballast to evade enemy destroyers and fight off floods. Every decision impacts your survival in the crushing deep.

**Highlights:** Procedural arcade survival gameplay, Instrument-based control (sonar, gauges, levers), Manage hull integrity and flooding, Evade enemy destroyers and depth charges, Limited torpedo supply, Multiple game modes (Endless, Daily, Quota)

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

**In-app purchases:** none


## Frequently asked questions

### Is Space Defender 3D free?

Space Defender 3D is free to download, with in-app purchases available.

### Is Submarine Panic free?

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

### Do Space Defender 3D or Submarine Panic have ads?

Neither Space Defender 3D nor Submarine Panic shows ads.

### Which is updated more often, Space Defender 3D or Submarine Panic?

Space Defender 3D ships an update every 4 days, and Submarine Panic every 5 days. Most recently, Space Defender 3D was updated on October 27, 2026 and Submarine Panic on October 31, 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.*