# Planet Gravity vs Hellios

The clearest difference is update cadence: Hellios at daily against Planet Gravity's every 14 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, Hellios daily. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Planet Gravity | Hellios |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Daily** |
| Monetization | Free | — |
| Size | 5 MB | 34 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [Volodymyr Shcherbiuk](https://appshunter.io/developer/1815761531) |

## 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


### Hellios

[App page](https://appshunter.io/ios/app/hellios/id6753183265)

**In-app purchases:** none


## Frequently asked questions

### Is Planet Gravity free?

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

### Is Hellios free?

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

### Do Planet Gravity or Hellios have ads?

Neither Planet Gravity nor Hellios shows ads.

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

Planet Gravity ships an update every 14 months, and Hellios daily. Most recently, Planet Gravity was updated on October 6, 2026 and Hellios on October 11, 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.*