# City Jump vs Gravity OB1

The clearest difference is in-app purchases: City Jump at none against Gravity OB1's 1. Gravity OB1's advantage is ads (none vs shown) and update cadence (every 5 days vs every 29 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Gravity OB1 sells 1 one-off in-app purchase. City Jump asks for nothing beyond the download.

City Jump ships an update every 29 months, Gravity OB1 every 5 days. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | City Jump | Gravity OB1 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 29 months | **Every 5 days** |
| Size | 203 MB | 25 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Plexonic Games](https://appshunter.io/developer/1723907892) | [Q8blog](https://appshunter.io/developer/380669318) |

## What reviewers say

### City Jump

[App page](https://appshunter.io/ios/app/city-jump/id1445680835)

**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 City Jump free?

City Jump 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 City Jump or Gravity OB1 have ads?

City Jump shows ads; Gravity OB1 does not.

### Which is updated more often, City Jump or Gravity OB1?

City Jump ships an update every 29 months, and Gravity OB1 every 5 days. Most recently, City Jump was updated on October 6, 2026 and Gravity OB1 on October 14, 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.*