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 drop circles to complete objectives, but avoid hitting the line to prevent a game over.
- Physics-based gameplay
- Color matching mechanics
- Strategic circle placement
- Level-based objectives
- Risk/reward gameplay
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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
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.
- 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
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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 3.9. Screw Machine also leads on update cadence (every 4 days vs monthly) and ratings volume (445 vs 8). On price, ads, in-app purchases and monetization model 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 6 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 3.9. That said, the two scores are not equally well evidenced: Screw Machine has 445 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 33% of Circle Sort's written reviews are positive against 50% of Screw Machine's.
Circle Sort ships an update monthly, Screw Machine every 4 days. The most recent releases landed on October 11, 2026 and October 17, 2026 respectively.
| Parameter | Circle Sort | Screw Machine |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (8 ratings) | 4.9 (445 ratings) — better |
| Positive reviews | 33.3% of reviews | 50.0% of reviews — better |
| Number of ratings | 8 | 445 — 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 | 256 MB | 368 MB |
| Age rating | 4+ | 4+ |
| Developer | Game5mobile | Twist Games |
Customer experience
Circle Sort
Screw Machine
In-app purchases
Circle Sort
- 100 Coins$0.99
- 500 Coins$6.99
- 1000 Coins$14.99
Show 3 moreShow fewer
- 5000 Coins$24.99
- 10000 Coins$49.99
- 15000 Coins$99.99
Screw Machine
- 1000 Coins$1.99
- Fail Offer$4.99
- 5000 Coins$7.99
Show 7 moreShow fewer
- No Ads$7.99
- Small Bundle$9.99
- No Ads Bundle$12.99
- 10000 Coins$14.99
- Medium Bundle$19.99
- Large Bundle$29.99
- Mega Bundle$49.99








