# Spire vs Singularity

The clearest difference is in-app purchases: Spire at none against Singularity's 1. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Spire | Singularity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Size | 69 MB | 119 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cristopher Guido](https://appshunter.io/developer/1849716676) | [Alfredo Siezar](https://appshunter.io/developer/6796474331) |

## What reviewers say

### Spire

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

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

**In-app purchases:** none


### Singularity

[App page](https://appshunter.io/ios/app/singularity-tower-defense/id6796474329)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Spire free?

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

### Is Singularity free?

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

### Do Spire or Singularity have ads?

Both Spire and Singularity show 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.*