# Quack Sort vs Screw Machine

Quack Sort and Screw Machine both sit at 4.9 stars, but that hides the real split: 63% of Quack Sort's written reviews are positive against 50% of Screw Machine's. Quack Sort also leads on chart position (#97 vs unranked) and ratings volume (3K vs 445). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Quack Sort sells 17 one-off in-app purchases and Screw Machine sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Quack Sort against 4.9 for Screw Machine. That said, the two scores are not equally well evidenced: Quack Sort has 3K ratings behind it against 445, so its average is the more settled of the two. Written reviews are what separate them: 63% of Quack Sort's written reviews are positive against 50% of Screw Machine's.

Quack Sort ships an update every 5 days, Screw Machine every 4 days. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Quack Sort | Screw Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (3K ratings)](https://appshunter.io/ios/app/quack-sort-loop-puzzle/id6791110153/reviews) | **[4.9 (445 ratings)](https://appshunter.io/ios/app/screw-machine/id6801033982/reviews)** |
| Number of ratings | **3K** | 445 |
| Positive reviews | **63.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#97** | — |
| Size | 403 MB | 368 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LE TECH CO.,LIMITED](https://appshunter.io/developer/1742170855) | [Twist Games](https://appshunter.io/developer/1854442218) |

## What reviewers say

### Quack Sort

[App page](https://appshunter.io/ios/app/quack-sort-loop-puzzle/id6791110153)

**Currently charting:** #97 Top Grossing · Puzzle, #105 Top Grossing · Casual, #164 Top Free · Puzzle, #177 Top Free · Casual (US App Store)

Engage in a unique color-sorting puzzle where you tap groups of rubber ducks to send them onto a looping track. Match ducks by color and plan your moves carefully to avoid filling the path. Clear all ducks to complete clever levels with surprising obstacles and rewarding challenges.

**Highlights:** Color-sorting rubber duck puzzles, Looping track mechanic, Tap to send ducks, Match and sort by color, Manage limited space, Clever levels with obstacles, Helpful boosters

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mini Coin Pack | $1.99 | one-time |
| Small Offer | $1.99 | one-time |
| Starter Bundle | $1.99 | one-time |
| Revive Offer1 | $1.99 | one-time |
| Medium Offer | $4.99 | one-time |
| Quack Bundle | $4.99 | one-time |
| Revive Offer2 | $4.99 | one-time |
| Small Coin Pack | $7.99 | one-time |
| Ducky Pass | $9.99 | one-time |
| Large Bundle | $9.99 | one-time |
| Ad-Free Bundle | $11.99 | one-time |
| Super Bundle | $19.99 | one-time |
| Big Coin Pack | $29.99 | one-time |
| Mega Bundle | $39.99 | one-time |
| Super Coin Pack | $59.99 | one-time |
| Mega Coin Pack | $99.99 | one-time |
| Epic Bundle | $99.99 | one-time |


### Screw Machine

[App page](https://appshunter.io/ios/app/screw-machine/id6801033982)

A unique color-sorting puzzle game where you manage screws on a spinning machine. Tap panels to release screws and match them to their colored plates before the rail overloads. Features special mechanics like mystery plates and gates for added challenge.

**Highlights:** Spinning machine sorting mechanic, Color-matching screw puzzles, Tap-to-release screw panels, Special game-changing parts (mystery plates, gates), Offline play, No timer or move counter

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Coins | $1.99 | one-time |
| Fail Offer | $4.99 | one-time |
| 5000 Coins | $7.99 | one-time |
| No Ads | $7.99 | one-time |
| Small Bundle | $9.99 | one-time |
| No Ads Bundle | $12.99 | one-time |
| 10000 Coins | $14.99 | one-time |
| Medium Bundle | $19.99 | one-time |
| Large Bundle | $29.99 | one-time |
| Mega Bundle | $49.99 | one-time |


## Frequently asked questions

### Is Quack Sort free?

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

### Is Screw Machine free?

Screw Machine is free to download, with in-app purchases available.

### Which has better reviews, Quack Sort or Screw Machine?

Screw Machine is rated higher. Quack Sort averages 4.9 out of 5 from 3K ratings, while Screw Machine averages 4.9 from 445 ratings.

### Do Quack Sort or Screw Machine have ads?

Both Quack Sort and Screw Machine show ads.

### Which is updated more often, Quack Sort or Screw Machine?

Quack Sort ships an update every 5 days, and Screw Machine every 4 days. Most recently, Quack Sort was updated on October 23, 2026 and Screw Machine on October 20, 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.*