# Clever Gravity vs DropOS

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.

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.

## The numbers

| Metric | Clever Gravity | DropOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/clever-gravity/id1325528694/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/dropos-marble-machine/id6788594506/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 53 months | **Every 6 days** |
| Monetization | Ad-supported | **Free** |
| Size | 4 MB | 70 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Jan Brelje](https://appshunter.io/developer/1299414975) | [LaunchKitOS](https://appshunter.io/developer/6820402257) |

## What reviewers say

### Clever Gravity

[App page](https://appshunter.io/ios/app/clever-gravity/id1325528694)

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.

**Highlights:** Tap to stack blocks, Precise platform alignment, Build the tallest tower, Test reflexes, High score challenge

**Features:** macOS Compatibility

**In-app purchases:** none


### DropOS

[App page](https://appshunter.io/ios/app/dropos-marble-machine/id6788594506)

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.

**Highlights:** Physics-based contraption puzzles, Strategic marble dropping, 100 hand-designed levels, Weekly leaderboard, Earn in-game cogs, Bonus brass pin board

**In-app purchases:** none


## Frequently asked questions

### Is Clever Gravity free?

Clever Gravity is free to download, with no in-app purchases.

### Is DropOS free?

DropOS is free to download, with no in-app purchases.

### Which has better reviews, Clever Gravity or DropOS?

Clever Gravity and DropOS are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Clever Gravity or DropOS have ads?

Clever Gravity shows ads; DropOS does not.

### Which is updated more often, Clever Gravity or DropOS?

Clever Gravity ships an update every 53 months, and DropOS every 6 days. Most recently, Clever Gravity was updated on November 2, 2026 and DropOS on October 31, 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.*