Hemoglobin Hospital vs Wool Sort!
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Hemoglobin Hospital
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.
- Bond oxygen to red blood cells
- Create perfect red blood cells
- Build score chains
- Manage O2 gauge
- Use O2 bombs
- Collect oxygen capsules
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Introducing a new blood-based action puzzle experience! As red blood cells flow through the bloodstream, it's your job to bond oxygen molecules to them! *Note: Actual red blood cells and hemoglobin differ greatly in appearance and form from those seen in the game. === How to play === (1)Rules - As red blood cells flow through the bloodstream, drag the oxygen panels on the left and right side of the screen to make each cell have a complete 4 oxygen units. - Once a cell has 4 oxygen molecules attached, it's a “perfect red blood cell” - As you create more perfect red blood cells, a chain will build up, boosting your score. - If an incomplete blood cell passes through, your O2 gauge will decrease. Once empty, it's game over. (2) O2 bombs - When the O2 button on the upper right of the screen starts to blink, you can tap it to launch an oxygen bomb. This bomb replenishes all red blood cells onscreen and makes them perfect. - Occasionally, you'll see an oxygen capsule floating through. Tap it to partially replenish your O2 bomb gauge. Collect more of these to fill it back up.
Wool Sort!
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.
- One-tap painting gameplay
- Color-matching puzzles
- Limited paint strategy
- Bunny positioning mechanics
- Image reveal progression
- Relaxed puzzle loop
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The pictures in this world have lost their color and only a team of over-enthusiastic bunnies can fix that. Each level starts as a blank scene. With a single tap, you send a bunny painter hopping in to splash paint across the board, filling in matching areas and slowly revealing the image underneath. Every bunny has a limited amount of paint, so choosing who goes in -and when- matters more than how fast you tap. Some bunnies need a break before jumping back in. Others are better saved for later. There’s always a small queue waiting for your signal, and the painting space itself can get crowded if you rush things. Take your time, keep the colors flowing, and watch the scene come together one perfect splash at a time. It’s a calm, clever puzzle loop built around rhythm, planning, and that deeply satisfying moment when the final color clicks into place. Why it’s so satisfying: One-tap play that feels relaxed, not rushed Color-based puzzles that reward smart timing Gentle strategy through limited paint and positioning A steady sense of progress as images come alive For players who enjoy soothing puzzles, cute characters, and progress you can see. Pick a bunny. Add some color. Reveal the picture.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Hemoglobin Hospital | Wool Sort! |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 254 MB |
| Age rating | 4+ | 4+ |
| Developer | Masakazu Yonehara | SURREEL YAZILIM VE PAZARLAMA ANONIM SIRKETI |
In-app purchases
Hemoglobin Hospital
No in-app purchases
Wool Sort!
- 1000 Coin$1.99
- Small Bundle$4.99
- 5000 Coin$8.99
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- Medium Bundle$9.99
- 10000 Coins$17.99
- Ultra Bundle$19.99
- 25000 Coins$34.99
- 50000 Coins$59.99
- 100000 Coins$99.99
Questions
Is Hemoglobin Hospital free?
Is Wool Sort! free?
Which has better reviews, Hemoglobin Hospital or Wool Sort!?
Do Hemoglobin Hospital or Wool Sort! have ads?
Which is updated more often, Hemoglobin Hospital or Wool Sort!?
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