Clever Gravity vs DropOS
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Clever Gravity
Test your reflexes and precision by tapping to stack blocks. Aim to perfectly align each piece with the platform below to build the tallest tower possible. Challenge yourself to see how high you can stack.
- Tap to stack blocks
- Precise platform alignment
- Build the tallest tower
- Test reflexes
- High score challenge
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How clever are you? Tap to stack and don't miss the platform.
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 - Exclusive looks to collect as you play: rare marble sets, board finishes, and lever trims - Three brass instruments for a stubborn board: 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
Clever Gravity and DropOS both sit at 5.0 stars, but that hides the real split: 100% of DropOS's written reviews are positive against 0% of Clever Gravity's. DropOS also leads on ads (none vs shown) and update cadence (every 6 days vs every 53 months). Clever Gravity's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.0). On price, rating, ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Clever Gravity against 5.0 for DropOS. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews are what separate them: 0% of Clever Gravity's written reviews are positive against 100% of DropOS's.
Clever Gravity ships an update every 53 months, DropOS every 6 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | Clever Gravity | DropOS |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (3 ratings) |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 53 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 70 MB |
| Age rating | 12+ | 4+ |
| Developer | Jan Brelje | LaunchKitOS |
Customer experience
Clever Gravity
DropOS
In-app purchases
Clever Gravity
No in-app purchases
DropOS
No in-app purchases








