# Deep Diver 3D vs Gravity OB1

The clearest difference is in-app purchases: Deep Diver 3D at none against Gravity OB1's 1. Deep Diver 3D also leads on iOS requirement (11.0 vs 13.4). Gravity OB1's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Gravity OB1 sells 1 one-off in-app purchase. Deep Diver 3D asks for nothing beyond the download.

## The numbers

| Metric | Deep Diver 3D | Gravity OB1 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 5 days |
| Size | 115 MB | 25 MB |
| Requires iOS | **11.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Engin Ulukurtlar](https://appshunter.io/developer/1546844868) | [Q8blog](https://appshunter.io/developer/380669318) |

## What reviewers say

### Deep Diver 3D

[App page](https://appshunter.io/ios/app/deep-diver-3d/id1590836348)

**Features:** macOS Compatibility

**In-app purchases:** none


### Gravity OB1

[App page](https://appshunter.io/ios/app/gravity-ob1/id6788852525)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $3.99 | one-time |


## Frequently asked questions

### Is Deep Diver 3D free?

Deep Diver 3D is free to download, with no in-app purchases.

### Is Gravity OB1 free?

Gravity OB1 is free to download, with in-app purchases available.

### Do Deep Diver 3D or Gravity OB1 have ads?

Deep Diver 3D shows ads; Gravity OB1 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.*