# Fluids & Particle Simulation vs Atomus

The clearest difference is in-app purchases: Atomus at none against Fluids & Particle Simulation's 8. Fluids & Particle Simulation's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.6). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Fluids & Particle Simulation sells 8 in-app purchases, starting at $2.99 per 7 days. Atomus asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Fluids & Particle Simulation against 4.8 for Atomus. Both are backed by a comparable volume of ratings — 770 and 524 respectively. Written reviews split almost evenly too, at 90% and 90% positive.

Fluids & Particle Simulation ships an update monthly, Atomus every 2 months. The most recent releases landed on August 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Fluids & Particle Simulation | Atomus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (770 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews) | **[4.8 (524 ratings)](https://appshunter.io/ios/app/atomus/id1605327908/reviews)** |
| Number of ratings | **770** | 524 |
| Positive reviews | 89.6% of reviews | **90.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 189 MB | 91 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [SungLab Inc](https://appshunter.io/developer/1691666995) |

## What reviewers say

### Fluids & Particle Simulation

[App page](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221)

Create mesmerizing, psychedelic fluid art with your fingertips. This app offers a calming and creative outlet to reduce stress and channel negative emotions into beautiful, flowing patterns. Enjoy a unique ASMR experience with sound-reactive visuals and customizable parameters.

**Highlights:** Interactive fluid art simulation, Sound-reactive fluids, Dozens of customizable parameters, Autopilot mode, Gyrosensor and haptic feedback integration, Real-time sound synthesis, Video recording and screenshot functionality

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $2.99 | per 7 days |
| Unlock all \| monthly premium | $5.99 | per month |
| Fluids PRO | $17.99 | per year |
| Unlock all Presets (iOS) | $1.99 | one-time |
| Unlock all Presets (OS X Mac) | $2.99 | one-time |
| Unlock all features | $14.99 | one-time |
| Psychedelic magic (OS X Mac) | $24.99 | one-time |
| Psychedelic magic (iOS) | $44.99 | one-time |

**What reviewers like**

- 🚀 Mesmerizing visuals
- 👍 Relaxing and calming experience
- 🎨 Customizable color and fluid effects
- 🎶 Enjoyable audio/music integration
- 💡 Innovative and creative app concept

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔋 Device overheating issues
- 💰 Paid features may be too expensive
- 🔇 Lack of volume/audio control options

**Reported bugs**

- Microphone input not working as expected
- Difficulty resetting or restoring default settings

**Requested features**

- Ability to sync visuals with external audio/music
- More preset options and visual effects
- Improved UI/UX for settings and controls
- Support for casting to external displays


### Atomus

[App page](https://appshunter.io/ios/app/atomus/id1605327908)

This app is an interactive visualizer that creates beautiful, dynamic art inspired by natural phenomena and abstract concepts. It offers customizable particle effects, multi-touch interaction, and music integration, designed to inspire creativity or provide a relaxing visual experience.

**Highlights:** 10-Finger Multi-touch Display, 5 Music Choices, Fastest Speed (60 FPS), 12,000 Particles, Customizable Particle Length, Number, & Size, 3-Color Modes

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

**In-app purchases:** none

**What reviewers like**

- 👍 Relaxing and calming experience
- 🚀 Smooth and responsive
- 💡 Customizable particle effects
- 🔒 No ads or in-app purchases

**What reviewers complain about**

- 🐛 Occasional crashes or performance issues
- 💡 Limited color and customization options
- 🔋 Drains battery life quickly

**Reported bugs**

- Crashes when using more than 10 fingers
- Inconsistent ad frequency

**Requested features**

- More color and particle effect options
- Ability to turn off sound/music
- Haptic feedback support


## Frequently asked questions

### Is Fluids & Particle Simulation free?

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

### Is Atomus free?

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

### Which has better reviews, Fluids & Particle Simulation or Atomus?

Atomus is rated higher. Fluids & Particle Simulation averages 4.7 out of 5 from 770 ratings, while Atomus averages 4.8 from 524 ratings.

### Do Fluids & Particle Simulation or Atomus have ads?

Atomus shows ads; Fluids & Particle Simulation does not.

### Which is updated more often, Fluids & Particle Simulation or Atomus?

Fluids & Particle Simulation ships an update monthly, and Atomus every 2 months. Most recently, Fluids & Particle Simulation was updated on August 16, 2026 and Atomus 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.*