# Gravity Zen vs Particle Simulation

The clearest difference is review sentiment: Gravity Zen at 93% against Particle Simulation's 25%. Gravity Zen also leads on update cadence (every 9 days vs every 7 months) and rating (4.8 vs 4.5). Particle Simulation's advantage is price (Free vs $0.99) and iOS requirement (12.0 vs 15.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Particle Simulation is free to download; Gravity Zen costs $0.99 up front. Gravity Zen sells 2 one-off in-app purchases and Particle Simulation sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Gravity Zen holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 68 and 46 respectively. Written reviews point the same way: 93% of Gravity Zen's written reviews are positive against 25% of Particle Simulation's.

Gravity Zen ships an update every 9 days, Particle Simulation every 7 months. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Gravity Zen | Particle Simulation |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (68 ratings)](https://appshunter.io/ios/app/gravity-zen/id1602081846/reviews)** | [4.5 (46 ratings)](https://appshunter.io/ios/app/particle-simulation-flow-sim/id6467405758/reviews) |
| Number of ratings | **68** | 46 |
| Positive reviews | **93.3% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 7 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 13 MB | 132 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dominik Hauser](https://appshunter.io/developer/325836858) | [Marvin Krueger](https://appshunter.io/developer/1152894281) |

## What reviewers say

### 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 |


### Particle Simulation

[App page](https://appshunter.io/ios/app/particle-simulation-flow-sim/id6467405758)

Explore a world of creativity and find tranquility with mesmerizing particle simulations. Interact with dynamic particles, customize their behavior, and create beautiful art impressions while listening to meditative music. It's a calming and creative outlet for stress reduction and self-expression.

**Highlights:** Dynamic particle simulation, Meditative music, Customizable parameters, Autopilot mode, Gyrosensor and haptic feedback, Capture and share creations, Save and load presets

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Particles PRO | $2.99 | per 7 days |
| Psychedelic magic \| monthly | $3.99 | per month |
| Particles PRO | $12.99 | per year |
| Psychedelic magic | $19.99 | one-time |


## Frequently asked questions

### Is Gravity Zen free?

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

### Is Particle Simulation free?

Particle Simulation is free to download, with in-app purchases available.

### Which has better reviews, Gravity Zen or Particle Simulation?

Gravity Zen is rated higher. Gravity Zen averages 4.8 out of 5 from 68 ratings, while Particle Simulation averages 4.5 from 46 ratings.

### Do Gravity Zen or Particle Simulation have ads?

Neither Gravity Zen nor Particle Simulation shows ads.

### Which is updated more often, Gravity Zen or Particle Simulation?

Gravity Zen ships an update every 9 days, and Particle Simulation every 7 months. Most recently, Gravity Zen was updated on September 21, 2026 and Particle Simulation on September 9, 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.*