# Hemoglobin Hospital vs Wool Sort!

The clearest difference is rating: Hemoglobin Hospital at 3.8 against Wool Sort!'s 2.0. Hemoglobin Hospital also leads on in-app purchases (none vs 9) and ratings volume (4 vs 1). Wool Sort!'s advantage is update cadence (every 2 days vs every 4 months) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

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

Hemoglobin Hospital holds the better App Store score, 3.8 against 2.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Hemoglobin Hospital ships an update every 4 months, Wool Sort! every 2 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Hemoglobin Hospital | Wool Sort! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/hemoglobin-hospital/id539313409/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/wool-sort/id6759789923/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 254 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masakazu Yonehara](https://appshunter.io/developer/1339210794) | [SURREEL YAZILIM VE PAZARLAMA ANONIM SIRKETI](https://appshunter.io/developer/1812376744) |

## What reviewers say

### Hemoglobin Hospital

[App page](https://appshunter.io/ios/app/hemoglobin-hospital/id539313409)

Engage in a unique action puzzle game where you manage oxygen levels for red blood cells. Strategically attach oxygen molecules to create perfect cells and build high scores. Avoid incomplete cells to prevent your O2 gauge from depleting.

**Highlights:** Bond oxygen to red blood cells, Create perfect red blood cells, Build score chains, Manage O2 gauge, Use O2 bombs, Collect oxygen capsules

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

**In-app purchases:** none


### Wool Sort!

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

Guide enthusiastic bunnies to restore color to blank scenes by tapping to paint matching areas. Strategically choose which bunny paints when, managing their paint limits and positioning to reveal the hidden image. Enjoy a calm, satisfying puzzle experience focused on rhythm and planning.

**Highlights:** One-tap painting gameplay, Color-matching puzzles, Limited paint strategy, Bunny positioning mechanics, Image reveal progression, Relaxed puzzle loop

**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 Hemoglobin Hospital free?

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

### Is Wool Sort! free?

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

### Which has better reviews, Hemoglobin Hospital or Wool Sort!?

Hemoglobin Hospital is rated higher. Hemoglobin Hospital averages 3.8 out of 5 from 4 ratings, while Wool Sort! averages 2.0 from 1 ratings.

### Do Hemoglobin Hospital or Wool Sort! have ads?

Both Hemoglobin Hospital and Wool Sort! show ads.

### Which is updated more often, Hemoglobin Hospital or Wool Sort!?

Hemoglobin Hospital ships an update every 4 months, and Wool Sort! every 2 days. Most recently, Hemoglobin Hospital was updated on November 4, 2026 and Wool Sort! on October 31, 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.*