# Planet Gravity vs The Public Variable

The clearest difference is update cadence: The Public Variable at every 2 weeks against Planet Gravity's every 14 months. The Public Variable also leads on iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and monetization model 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, The Public Variable every 2 weeks. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Planet Gravity | The Public Variable |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/the-public-variable/id6741500963/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 5 MB | 1.4 GB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [John Sullivan](https://appshunter.io/developer/1630479388) |

## 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


### The Public Variable

[App page](https://appshunter.io/ios/app/the-public-variable/id6741500963)

Experience a unique augmented reality theatre piece exploring perspective and communication. This evolving digital space will eventually host the full production, offering an immersive artistic experience accessible from anywhere.

**Highlights:** Augmented reality theatre, Perspective exploration, Immersive digital space, Evolving content, Accessible anywhere

**In-app purchases:** none


## Frequently asked questions

### Is Planet Gravity free?

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

### Is The Public Variable free?

The Public Variable is free to download, with no in-app purchases.

### Do Planet Gravity or The Public Variable have ads?

Neither Planet Gravity nor The Public Variable shows ads.

### Which is updated more often, Planet Gravity or The Public Variable?

Planet Gravity ships an update every 14 months, and The Public Variable every 2 weeks. Most recently, Planet Gravity was updated on October 6, 2026 and The Public Variable on October 12, 2026.

---

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