# fluidity HD vs Fluids & Particle Simulation

The clearest difference is rating: Fluids & Particle Simulation at 4.7 against fluidity HD's 3.7. Fluids & Particle Simulation also leads on review sentiment (90% vs 73%) and ratings volume (770 vs 124). fluidity HD's advantage is iOS requirement (8.0 vs 13.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. fluidity HD sells 1 one-off in-app purchase and Fluids & Particle Simulation sells 8 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Fluids & Particle Simulation holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Fluids & Particle Simulation has 770 ratings behind it against 124, so its average is the more settled of the two. Written reviews point the same way: 73% of fluidity HD's written reviews are positive against 90% of Fluids & Particle Simulation's.

fluidity HD ships an update every 2 months, Fluids & Particle Simulation monthly. The most recent releases landed on September 28, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | fluidity HD | Fluids & Particle Simulation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (124 ratings)](https://appshunter.io/ios/app/fluidity-hd/id399403909/reviews) | **[4.7 (770 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews)** |
| Number of ratings | 124 | **770** |
| Positive reviews | 73.3% of reviews | **89.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 24 MB | 189 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [nebulus design](https://appshunter.io/developer/351409194) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### fluidity HD

[App page](https://appshunter.io/ios/app/fluidity-hd/id399403909)

Experience a beautiful, real-time fluid dynamics simulation. Control the flow and colors of liquids with intuitive touch gestures. Unlock advanced features like ambient audio and video output through an in-app purchase.

**Highlights:** Real-time fluid dynamics simulation, Interactive touch controls, Stunning color customization, Ambient audio (in-app purchase), Snapshot and video output (in-app purchase)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version Unlock | $1.99 | one-time |

**What reviewers like**

- 🌈 Visually stunning and mesmerizing
- 🧘‍♀️ Calming and relaxing experience
- 🎨 Vibrant and customizable colors
- 👍 Great for kids and adults

**What reviewers complain about**

- 🐛 Crashes and freezes on some devices
- 🔇 Lack of audio/music features
- 💰 Paid version not worth the cost
- 🔋 High battery consumption

**Reported bugs**

- Crashes on double-tap
- Incompatible with newer iOS
- Stuck finger gestures

**Requested features**

- Add music/ambient sound options
- Ability to save/export creations
- More customization controls
- Support for latest iOS versions


### 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


## Frequently asked questions

### Is fluidity HD free?

fluidity HD is free to download, with in-app purchases available.

### Is Fluids & Particle Simulation free?

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

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

Fluids & Particle Simulation is rated higher. fluidity HD averages 3.7 out of 5 from 124 ratings, while Fluids & Particle Simulation averages 4.7 from 770 ratings.

### Do fluidity HD or Fluids & Particle Simulation have ads?

Neither fluidity HD nor Fluids & Particle Simulation shows ads.

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

fluidity HD ships an update every 2 months, and Fluids & Particle Simulation monthly. Most recently, fluidity HD was updated on September 28, 2026 and Fluids & Particle Simulation on August 16, 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.*