Circle Sort vs Screw Machine
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Circle Sort
A physics-based puzzle game where players match ring colors to clear the board. Strategically place circles to avoid hitting the line and complete level objectives.
- Physics-based gameplay
- Color matching mechanics
- Strategic circle placement
- Level-based objectives
- Avoid hitting the line
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Circle Sort is a fresh physics puzzle game where you have to match the colors to clear the rings. Drop the circles to the right spot, clear some space and complete the goals! Strategize your circle placements to win, but beware to not hit the line or it's game over!
Screw Machine
This game offers a unique twist on color-sorting puzzles. Instead of stacking, you release screws onto a spinning machine, timing your taps to thread each color into its matching plate. Fill all plates to win, but beware of overloading the rail and jamming the machine.
- Color-sorting screw puzzle
- Spinning machine gameplay
- Timing-based screw threading
- Level-based progression
- Special game-changing parts
- Offline play
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Screw Machine is a color-sorting screw puzzle with a moving twist. Instead of stacking screws onto a bolt, you spill screws onto a spinning machine and let timing do the sorting. Tap a panel drop its screws onto the rail, and watch each color thread itself into its matching plate as the ring carries it around. Fill every plate to win. Overload the rail and the whole machine seizes up. HOW THE MACHINE WORKS • Tap a panel to loosen its screws onto the spinning rail • Four color plates sit around the ring — each one takes three screws of its color • As the machine turns, every screw passing its matching plate drives itself in • Fill a plate and it locks shut; the next color rolls up behind it • Clear all the plates to finish the level KEEP IT TURNING • The rail only holds so many screws, release colors with nowhere to go and it jams solid • Read the machine before you tap: open the panels whose colors have an open plate • No move counter, no timer, you only lose if the rail jams for good • Every level is a small sorting puzzle built to be untangled PARTS THAT CHANGE THE GAME • Mystery plates: The next color stays hidden behind a "?" until it rolls into place • Gates: Run a screw through and it splits into more • Tunnels: Feed a whole extra run of panels onto the board • Arrows: Panels that you can only unlock from a certain direction WHY IT'S HARD TO PUT DOWN • A fresh, tactile spin on the nuts and bolts puzzles you already love • One-tap, simple, with real timing and planning underneath • Hand-built levels that stay clever without ever feeling like work • Oddly satisfying to watch, screws driving home, plates locking in sequence • Play offline, anywhere, no wifi needed • Free to play, with lives that refill over time Loosen the screws. Run the machine. Sort every color.
Screenshots
Verdict
The clearest difference is rating: Screw Machine at 4.9 against Circle Sort's 4.0. Screw Machine also leads on update cadence (every 4 days vs monthly) and ratings volume (841 vs 10). On price, review sentiment, ads and in-app purchases 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. Circle Sort sells 10 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.
Screw Machine holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Screw Machine has 841 ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 60% of Circle Sort's written reviews are positive against 57% of Screw Machine's, so the app with the better star average is not the one people write more warmly about.
Circle Sort ships an update monthly, Screw Machine every 4 days. Both last shipped on November 8, 2026.
| Parameter | Circle Sort | Screw Machine |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (10 ratings) | 4.9 (841 ratings) — better |
| Positive reviews | 60.0% of reviews — better | 57.1% of reviews |
| Number of ratings | 10 | 841 — better |
| Update frequency | Monthly | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 279 MB | 430 MB |
| Age rating | 4+ | 4+ |
| Developer | Game5mobile | Twist Games |
Customer experience
Circle Sort
Screw Machine
In-app purchases
Circle Sort
- 100 Coins$0.99
- Starter Pack$1.99
- Revive Offer$4.99
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- 500 Coins$6.99
- Remove Ads Bundle$9.99
- 1000 Coins$14.99
- 5000 Coins$24.99
- Circle Plus$39.99
- Circle Deluxe$79.99
- Circle Master$99.99
Screw Machine
- 1000 Coins$1.99
- Fail Offer$4.99
- 5000 Coins$7.99
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- No Ads$7.99
- Screw Pass$9.99
- Small Bundle$9.99
- No Ads Bundle$12.99
- 10000 Coins$14.99
- Medium Bundle$19.99
- Large Bundle$29.99








