# Quack Sort vs Screw Machine

The clearest difference is chart position: Quack Sort at #119 against Screw Machine's unranked. Quack Sort also leads on ratings volume (1.6K vs 378). On price, rating, review sentiment and update cadence 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 — 4.8 for Quack Sort against 4.9 for Screw Machine. Both are backed by a comparable volume of ratings — 1.6K and 378 respectively. Written reviews are what separate them: 69% of Quack Sort's written reviews are positive against 67% of Screw Machine's.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Quack Sort | Screw Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1.6K ratings)](https://appshunter.io/ios/app/quack-sort-loop-puzzle/id6791110153/reviews) | **[4.9 (378 ratings)](https://appshunter.io/ios/app/screw-machine/id6801033982/reviews)** |
| Number of ratings | **1.6K** | 378 |
| Positive reviews | **68.8% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#119** | — |
| Size | 399 MB | 329 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:** #119 Top Grossing · Puzzle, #129 Top Grossing · Casual, #164 Top Free · Puzzle, #181 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 4.8 out of 5 from 1.6K ratings, while Screw Machine averages 4.9 from 378 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 4 days, and Screw Machine every 4 days. Most recently, Quack Sort was updated on October 12, 2026 and Screw Machine on October 13, 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.*