# Screw Master vs DropOS

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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Screw Master | DropOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dropos-marble-machine/id6788594506/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | — | Every 6 days |
| Monetization | — | Free |
| Size | 111 MB | 28 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [荣 唐](https://appshunter.io/developer/1895991007) | [LaunchKitOS](https://appshunter.io/developer/6820402257) |

## What reviewers say

### Screw Master

[App page](https://appshunter.io/ios/app/screw-master-gravity-release/id6770506348)

**Features:** macOS Compatibility, Vision Pro support

**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 Screw Master free?

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

### Is DropOS free?

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

### Do Screw Master or DropOS have ads?

Screw Master shows ads; DropOS does not.

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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.*