# Planet Gravity vs Gravity Zen

The clearest difference is review sentiment: Gravity Zen at 93% against Planet Gravity's 44%. Gravity Zen also leads on price ($0.99 vs $11.00) and rating (4.8 vs 4.2). On ratings volume, in-app purchases, monetization model and device support there is nothing between them.

Planet Gravity costs $11.00 and Gravity Zen $0.99 up front. Planet Gravity sells 1 one-off in-app purchase and Gravity Zen sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Gravity Zen holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 54 and 68 respectively. Written reviews point the same way: 44% of Planet Gravity's written reviews are positive against 93% of Gravity Zen's.

Planet Gravity ships an update every 4 months, Gravity Zen every 9 days. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Planet Gravity | Gravity Zen |
| --- | --- | --- |
| Price | $11.00 | **$0.99** |
| Rating | [4.2 (54 ratings)](https://appshunter.io/ios/app/planet-gravity-simulateorbit/id1566504157/reviews) | **[4.8 (68 ratings)](https://appshunter.io/ios/app/gravity-zen/id1602081846/reviews)** |
| Number of ratings | 54 | **68** |
| Positive reviews | 44.1% of reviews | **93.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 108 MB | 13 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oscar Tsang](https://appshunter.io/developer/416987065) | [Dominik Hauser](https://appshunter.io/developer/325836858) |

## What reviewers say

### Planet Gravity

[App page](https://appshunter.io/ios/app/planet-gravity-simulateorbit/id1566504157)

Engage in a physics-based game simulating asteroid flight and solar system creation. Complete missions to explore the universe and pass the time. Discover other titles for freeform universe building.

**Highlights:** Physics-based gameplay, Asteroid simulation, Solar system creation, Level-based missions, Universe exploration

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Golden Pass | $2.99 | one-time |


### Gravity Zen

[App page](https://appshunter.io/ios/app/gravity-zen/id1602081846)

Observe small circles interacting with a central gravity field. Add numerous boxes to explore how they naturally settle into a stable arrangement. It's a simple yet captivating simulation.

**Highlights:** Gravity field simulation, Add multiple objects, Observe stable configurations, Interactive physics, Minimalist design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Large tip | $2.99 | one-time |


## Frequently asked questions

### Is Planet Gravity free?

Planet Gravity costs $11.00, and also offers in-app purchases.

### Is Gravity Zen free?

Gravity Zen costs $0.99, and also offers in-app purchases.

### Which has better reviews, Planet Gravity or Gravity Zen?

Gravity Zen is rated higher. Planet Gravity averages 4.2 out of 5 from 54 ratings, while Gravity Zen averages 4.8 from 68 ratings.

### Do Planet Gravity or Gravity Zen have ads?

Planet Gravity shows ads; Gravity Zen does not.

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

Planet Gravity ships an update every 4 months, and Gravity Zen every 9 days. Most recently, Planet Gravity was updated on September 23, 2026 and Gravity Zen on September 21, 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.*