# Gravity Orbit Lab vs knocky

Gravity Orbit Lab and knocky are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Gravity Orbit Lab | knocky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 7 MB | 83 MB |
| Requires iOS | 15 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [珺瑞 王](https://appshunter.io/developer/1861829279) | [Adem Guclu](https://appshunter.io/developer/1192501965) |

## What reviewers say

### Gravity Orbit Lab

[App page](https://appshunter.io/ios/app/gravity-orbit-lab/id6760806733)

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

**In-app purchases:** none


### knocky

[App page](https://appshunter.io/ios/app/knocky/id6761326370)

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

**In-app purchases:** none


## Frequently asked questions

### Is Gravity Orbit Lab free?

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

### Is knocky free?

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

### Do Gravity Orbit Lab or knocky have ads?

Neither Gravity Orbit Lab nor knocky shows ads.

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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.*