# Spire vs Eye Test

The clearest difference is in-app purchases: Eye Test at none against Spire's 5. Eye Test also leads on iOS requirement (13.0 vs 15.1). Spire's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Spire sells 5 one-off in-app purchases. Eye Test asks for nothing beyond the download.

## The numbers

| Metric | Spire | Eye Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Daily | — |
| Size | 36 MB | 21 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kalpesh Mistry](https://appshunter.io/developer/1896048735) | [SEOKWON YANG](https://appshunter.io/developer/1863325487) |

## What reviewers say

### Spire

[App page](https://appshunter.io/ios/app/spire-stack-tower/id6776787120)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Coins | $0.99 | one-time |
| Stack of Coins | $2.99 | one-time |
| Unlock Everything | $4.99 | one-time |
| Vault of Coins | $5.99 | one-time |
| Mountain of Coins | $9.99 | one-time |


### Eye Test

[App page](https://appshunter.io/ios/app/eye-test-slox/id6777143942)

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

**In-app purchases:** none


## Frequently asked questions

### Is Spire free?

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

### Is Eye Test free?

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

### Do Spire or Eye Test have ads?

Eye Test shows ads; Spire does not.

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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.*