# Planet Gravity vs NX

The clearest difference is update cadence: NX at every 4 months against Planet Gravity's every 14 months. NX also leads on iOS requirement (9.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Planet Gravity ships an update every 14 months, NX every 4 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Planet Gravity | NX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 5 MB | 146 MB |
| Requires iOS | 17.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [Directed Electronics Australia](https://appshunter.io/developer/1083778713) |

## What reviewers say

### Planet Gravity

[App page](https://appshunter.io/ios/app/planet-gravity/id995682820)

Explore the gravitational pull of different celestial bodies. Watch pendulums swing and collide under varying gravitational forces, offering a unique physics simulation experience.

**Highlights:** Select different planets for unique gravity, Observe pendulum collisions, Physics-based simulation, Educational planet facts, Interactive entertainment

**Features:** macOS Compatibility

**In-app purchases:** none


### NX

[App page](https://appshunter.io/ios/app/nx-1800/id1570167177)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Planet Gravity free?

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

### Is NX free?

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

### Do Planet Gravity or NX have ads?

Neither Planet Gravity nor NX shows ads.

### Which is updated more often, Planet Gravity or NX?

Planet Gravity ships an update every 14 months, and NX every 4 months. Most recently, Planet Gravity was updated on October 24, 2026 and NX on October 27, 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.*