Screw Master vs DropOS
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Screw Master
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A masterpiece of structural problem-solving where every turn of a screw changes the path of gravity. Discover the perfect blend of relaxation and mental stimulation in this innovative physics adventure. Your objective is deceptively simple: open the screws to dismantle complex structures and ensure that the trapped balls find their way into the collection tray. But don’t be fooled—each level requires a keen eye for engineering and timing. One wrong screw removed in the wrong order might leave your balls stuck or falling off-course. Can you find the precise sequence to unlock the fun? HOW TO SOLVE: Analyze the Structure: Look at how the balls are held and which screws are maintaining the balance. Tap to Unscrew: Click on the bolts to release segments of the mechanical frame. Guide the Fall: Predict how the gravity will pull the balls once the supports are gone. Fill the Tray: Successfully drop every ball into the target zone to clear the stage.
DropOS
Engage in a physics-based puzzle game where you strategically drop marbles into a contraption. Plan the sequence of drops to guide each marble into its matching bin, with each marble's passage altering the machine for the next.
- Physics-based contraption puzzles
- Strategic marble dropping
- 100 hand-designed levels
- Weekly leaderboard
- Earn in-game cogs
- Bonus brass pin board
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A da Vinci workshop, rendered in brass and gravity. In a lantern-lit workshop of brass and walnut, a marble waits at the top of a machine you cannot steer. Drag it into the top funnel and let go. Real gravity takes over, and the marble rolls, tips, and tumbles through the fixed contraption until it lands, ideally, in a bin that matches it. Then look again. Every piece that marble crossed has changed for the marble behind it. You plan the sequence. Physics does the rest. You never steer a marble in flight. You read the machine, then choose the order you drop them in. - The see-saw bit tips one way, then the other. The marble crossing it reroutes the next one. - The rotor does not toggle. It counts forward to its next exit with every pass. - The remote lever throws a switch from across the board. - The waterwheel never stops turning, so timing matters as much as logic. - The felt slows a marble to a crawl. It changes how late a marble arrives, never where it lands. - The wax seal carries the first marble across, then breaks. Every marble behind it drops through. Every marble in a bin that matches it, every bin filled, and the level is solved. A misfire is not a wall. Press the red knob and the machine re-cocks itself, ready for a new order. Walking out on a run already in motion costs your streak, so the machine asks first. What's inside - 100 hand-designed levels, rated one to five in difficulty - One new idea at a time: no two pieces debut on the same board - More waiting deeper in: the gilded marble, the cam tongue, the trapdoor, the pendulum, the drumskin, and the press - A weekly boards leaderboard to climb - Earn cogs as you play and grow your purse - The Cascade, a bonus brass pin board: no randomness in the drop, just physics - Three brass instruments to earn and spend: the Hourglass, the Blueprint, and the Apprentice Built like a puzzle box. Every surface is warm brass, walnut, or aged parchment, and every word is set in EB Garamond, the serif of an old draftsman's manual. Yours to play, quietly. No ads. No sign-in. No ad-tracking or ad-targeting software. DropOS needs no connection to play; anything synced for the leaderboard is anonymous by default. For anyone who loved the marble-drop puzzlers of the late 1990s, and for anyone meeting one for the first time.
Screenshots
Verdict
The clearest difference is ads: DropOS at none against Screw Master's shown. Screw Master's advantage is iOS requirement (13.0 vs 18.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Screw Master | DropOS |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | — | Every 6 days |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 111 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | 荣 唐 | LaunchKitOS |
In-app purchases
Screw Master
No in-app purchases
DropOS
No in-app purchases









