# Prime Defense vs Spire

The clearest difference is in-app purchases: Spire at none against Prime Defense's 1. Spire also leads on iOS requirement (16.4 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. Prime Defense sells 1 one-off in-app purchase. Spire asks for nothing beyond the download.

## The numbers

| Metric | Prime Defense | Spire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prime-defense/id6761935548/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 69 MB |
| Requires iOS | 26.2 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Philip McCarty](https://appshunter.io/developer/1892135349) | [Cristopher Guido](https://appshunter.io/developer/1849716676) |

## What reviewers say

### Prime Defense

[App page](https://appshunter.io/ios/app/prime-defense/id6761935548)

Engage in a fast-paced tower defense game defending your central tower from relentless enemy waves. Utilize a variety of weapons, upgrade your defenses, and unlock special abilities to survive increasingly difficult challenges.

**Highlights:** One-touch controls, Multiple weapon types, Tower upgrades, Special abilities, Endless waves, Tower personalization

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Continues | $0.99 | one-time |


### Spire

[App page](https://appshunter.io/ios/app/spire-tower-stack/id6781474812)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prime Defense free?

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

### Is Spire free?

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

### Do Prime Defense or Spire have ads?

Both Prime Defense and Spire show ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*