# DropOS vs Gravity Grid

The clearest difference is rating: DropOS at 5.0 against Gravity Grid's 2.0. DropOS also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Gravity Grid's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, review sentiment, 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.

DropOS holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | DropOS | Gravity Grid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dropos-marble-machine/id6788594506/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/gravity-grid-color-drop/id6794268530/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 days | — |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 159 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LaunchKitOS](https://appshunter.io/developer/6820402257) | [Tazigra LLC](https://appshunter.io/developer/1806820970) |

## What reviewers say

### 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


### Gravity Grid

[App page](https://appshunter.io/ios/app/gravity-grid-color-drop/id6794268530)

A unique puzzle game where you rotate the entire board to guide falling colored blocks into their matching exits. With thousands of levels and no timers on most, it offers a challenging yet relaxing experience.

**Highlights:** Board rotation gravity mechanic, Thousands of hand-tuned levels, No unwinnable levels, Offline play, Variety of new mechanics introduced gradually, Power-ups for assistance, Daily challenges

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

**In-app purchases:** none


## Frequently asked questions

### Is DropOS free?

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

### Is Gravity Grid free?

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

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

DropOS is rated higher. DropOS averages 5.0 out of 5 from 2 ratings, while Gravity Grid averages 2.0 from 1 ratings.

### Do DropOS or Gravity Grid have ads?

Gravity Grid 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.*