# Starbase Defender X vs Spin4

Starbase Defender X and Spin4 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Starbase Defender X | Spin4 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Monetization | Free | — |
| Size | 2 MB | 2 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Jay Phillips](https://appshunter.io/developer/686517321) | [敏刚 易](https://appshunter.io/developer/1872259103) |

## What reviewers say

### Starbase Defender X

[App page](https://appshunter.io/ios/app/starbase-defender-x/id1504002201)

Defend a research station from incoming objects and aliens. As a gunnery sergeant, your mission is to protect the base during secret gravity field experiments.

**Highlights:** Base defense gameplay, Alien combat, Gravity field experiments theme, Gunnery sergeant role, Research station protection

**In-app purchases:** none


### Spin4

[App page](https://appshunter.io/ios/app/spin4-rotating-connect/id6759542403)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Starbase Defender X free?

Starbase Defender X is free to download, with no in-app purchases.

### Is Spin4 free?

Spin4 is free to download, with no in-app purchases.

### Do Starbase Defender X or Spin4 have ads?

Neither Starbase Defender X nor Spin4 shows ads.

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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.*