# Spire vs Duel Echo

The clearest difference is ads: Duel Echo at none against Spire's shown. Duel Echo also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.4). On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Spire | Duel Echo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Size | 69 MB | 24 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cristopher Guido](https://appshunter.io/developer/1849716676) | [Arkadiusz Szafraniec](https://appshunter.io/developer/6775958010) |

## 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


### Duel Echo

[App page](https://appshunter.io/ios/app/duel-echo-melody-memory-game/id6789843693)

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

**In-app purchases:** none


## Frequently asked questions

### Is Spire free?

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

### Is Duel Echo free?

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

### Do Spire or Duel Echo have ads?

Spire shows ads; Duel Echo 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.*