# Atomus HD vs Particle Simulation

The clearest difference is review sentiment: Atomus HD at 91% against Particle Simulation's 25%. Atomus HD also leads on in-app purchases (none vs 4) and rating (4.8 vs 4.5). Particle Simulation's advantage is price (Free vs $3.99) and iOS requirement (12.0 vs 15.6). On ratings volume, update cadence, ads and device support there is nothing between them.

Particle Simulation is free to download; Atomus HD costs $3.99 up front. Particle Simulation sells 4 in-app purchases, starting at $2.99 per 7 days. Atomus HD asks for nothing beyond the download.

Atomus HD holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 60 and 46 respectively. Written reviews point the same way: 91% of Atomus HD's written reviews are positive against 25% of Particle Simulation's.

Atomus HD ships an update every 4 months, Particle Simulation every 7 months. The most recent releases landed on September 30, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Atomus HD | Particle Simulation |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.8 (60 ratings)](https://appshunter.io/ios/app/atomus-hd/id741515911/reviews)** | [4.5 (46 ratings)](https://appshunter.io/ios/app/particle-simulation-flow-sim/id6467405758/reviews) |
| Number of ratings | **60** | 46 |
| Positive reviews | **90.7% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 63 MB | 132 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SungLab Inc](https://appshunter.io/developer/1691666995) | [Marvin Krueger](https://appshunter.io/developer/1152894281) |

## What reviewers say

### Atomus HD

[App page](https://appshunter.io/ios/app/atomus-hd/id741515911)

Experience a premium kinetic universe of light and motion with dynamic, evolving particle structures. This app offers a richer, more immersive visual experience perfect for creative focus, relaxation, or quiet exploration.

**Highlights:** Evolving light and motion structures, Richer particle density and flow, Smooth 60 FPS rendering, 10-finger multi-touch support, Adjustable particle settings, Multiple color modes, Ad-free experience

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

**In-app purchases:** none

**What reviewers like**

- ✨ Visually stunning graphics
- 🧘‍♀️ Relaxing and calming experience
- 🎨 Creative and mesmerizing visuals
- 🎶 Beautiful and soothing music
- 🎮 Addictive and engaging gameplay

**What reviewers complain about**

- ⏳ Can become boring after a while
- ❓ Lack of user manual/explanations
- 🎶 Music can be repetitive
- 💸 Some users feel it's a waste of money
- 🎛️ Limited customization options

**Reported bugs**

- App crashes with 11 fingers
- Orientation issues on tablets
- Music not working
- Sound stopped working
- App freezes after opening and exiting

**Requested features**

- User manual or explanations
- Ability to customize starting points
- Option to record or save favorite settings
- Ability to take screenshots
- More music tracks/playlists


### 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 Atomus HD free?

Atomus HD costs $3.99, with no in-app purchases.

### Is Particle Simulation free?

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

### Which has better reviews, Atomus HD or Particle Simulation?

Atomus HD is rated higher. Atomus HD averages 4.8 out of 5 from 60 ratings, while Particle Simulation averages 4.5 from 46 ratings.

### Do Atomus HD or Particle Simulation have ads?

Neither Atomus HD nor Particle Simulation shows ads.

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

Atomus HD ships an update every 4 months, and Particle Simulation every 7 months. Most recently, Atomus HD was updated on September 30, 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.*