# Flight Constructor vs Gravity OB1

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

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

Flight Constructor ships an update every 9 days, Gravity OB1 every 5 days. The most recent releases landed on September 15, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Flight Constructor | Gravity OB1 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 5 days** |
| Size | 166 MB | 25 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Playcus Limited](https://appshunter.io/developer/1451803459) | [Q8blog](https://appshunter.io/developer/380669318) |

## What reviewers say

### Flight Constructor

[App page](https://appshunter.io/ios/app/flight-constructor/id6473088092)

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

**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 Flight Constructor free?

Flight Constructor 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 Flight Constructor or Gravity OB1 have ads?

Flight Constructor shows ads; Gravity OB1 does not.

### Which is updated more often, Flight Constructor or Gravity OB1?

Flight Constructor ships an update every 9 days, and Gravity OB1 every 5 days. Most recently, Flight Constructor was updated on September 15, 2026 and Gravity OB1 on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*