# Planet Gravity vs Two Links Double Pendulum

The clearest difference is update cadence: Planet Gravity at every 14 months against Two Links Double Pendulum's every 47 months. 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, Two Links Double Pendulum every 47 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | Planet Gravity | Two Links Double Pendulum |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 47 months |
| Monetization | Free | — |
| Size | 5 MB | 281 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) |

## 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


### Two Links Double Pendulum

[App page](https://appshunter.io/ios/app/two-links-double-pendulum/id1625794656)

**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 Two Links Double Pendulum free?

Two Links Double Pendulum is free to download, with no in-app purchases.

### Do Planet Gravity or Two Links Double Pendulum have ads?

Neither Planet Gravity nor Two Links Double Pendulum shows ads.

### Which is updated more often, Planet Gravity or Two Links Double Pendulum?

Planet Gravity ships an update every 14 months, and Two Links Double Pendulum every 47 months. Most recently, Planet Gravity was updated on October 6, 2026 and Two Links Double Pendulum on October 6, 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.*