# Happy Stack Equilibrium vs Wool Sort!

The clearest difference is in-app purchases: Happy Stack Equilibrium at none against Wool Sort!'s 9. Happy Stack Equilibrium also leads on ads (none vs shown). Wool Sort!'s advantage is update cadence (every 2 days vs every 76 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Wool Sort! sells 9 one-off in-app purchases. Happy Stack Equilibrium asks for nothing beyond the download.

Happy Stack Equilibrium ships an update every 76 months, Wool Sort! every 2 days. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Happy Stack Equilibrium | Wool Sort! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 76 months | **Every 2 days** |
| Size | 75 MB | 254 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Francesc Navarro Machio](https://appshunter.io/developer/488794379) | [SURREEL YAZILIM VE PAZARLAMA ANONIM SIRKETI](https://appshunter.io/developer/1812376744) |

## What reviewers say

### Happy Stack Equilibrium

[App page](https://appshunter.io/ios/app/happy-stack-equilibrium/id1519015365)

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

**In-app purchases:** none


### Wool Sort!

[App page](https://appshunter.io/ios/app/wool-sort/id6759789923)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Coin | $1.99 | one-time |
| Small Bundle | $4.99 | one-time |
| 5000 Coin | $8.99 | one-time |
| Medium Bundle | $9.99 | one-time |
| 10000 Coins | $17.99 | one-time |
| Ultra Bundle | $19.99 | one-time |
| 25000 Coins | $34.99 | one-time |
| 50000 Coins | $59.99 | one-time |
| 100000 Coins | $99.99 | one-time |


## Frequently asked questions

### Is Happy Stack Equilibrium free?

Happy Stack Equilibrium is free to download, with no in-app purchases.

### Is Wool Sort! free?

Wool Sort! is free to download, with in-app purchases available.

### Do Happy Stack Equilibrium or Wool Sort! have ads?

Wool Sort! shows ads; Happy Stack Equilibrium does not.

### Which is updated more often, Happy Stack Equilibrium or Wool Sort!?

Happy Stack Equilibrium ships an update every 76 months, and Wool Sort! every 2 days. Most recently, Happy Stack Equilibrium was updated on October 4, 2026 and Wool Sort! on October 15, 2026.

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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.*