# Key of Hero vs Stellar Stack Puzzle

The clearest difference is iOS requirement: Stellar Stack Puzzle at 12.0 against Key of Hero's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Key of Hero sells 2 one-off in-app purchases and Stellar Stack Puzzle sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Key of Hero | Stellar Stack Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 39 months | — |
| Size | 166 MB | 124 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Aepicomp, s.r.o.](https://appshunter.io/developer/339500287) | [Areeb Zahid](https://appshunter.io/developer/1715377928) |

## What reviewers say

### Key of Hero

[App page](https://appshunter.io/ios/app/key-of-hero/id6446199979)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gems | $0.99 | one-time |
| Remove ads | $0.99 | one-time |


### Stellar Stack Puzzle

[App page](https://appshunter.io/ios/app/stellar-stack-puzzle/id6599849625)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2K Coins | $1.99 | one-time |
| 4K Coins | $3.99 | one-time |
| 8K Coins | $4.99 | one-time |
| 12K Coins | $8.99 | one-time |
| 20K Coins | $12.99 | one-time |
| 35K Coins | $14.99 | one-time |


## Frequently asked questions

### Is Key of Hero free?

Key of Hero is free to download, with in-app purchases available.

### Is Stellar Stack Puzzle free?

Stellar Stack Puzzle is free to download, with in-app purchases available.

### Do Key of Hero or Stellar Stack Puzzle have ads?

Both Key of Hero and Stellar Stack Puzzle 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.*