# Fluids & Particle Simulation vs Optical Illusion Pro

The clearest difference is rating: Fluids & Particle Simulation at 4.7 against Optical Illusion Pro's 3.0. Fluids & Particle Simulation also leads on ads (none vs shown) and ratings volume (770 vs 2). Optical Illusion Pro's advantage is in-app purchases (none vs 8) and review sentiment (100% vs 90%). On price, device support and iOS requirement 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. Optical Illusion Pro asks for nothing beyond the download.

Fluids & Particle Simulation holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Fluids & Particle Simulation has 770 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 90% of Fluids & Particle Simulation's written reviews are positive against 100% of Optical Illusion Pro's, so the app with the better star average is not the one people write more warmly about.

## The numbers

| Metric | Fluids & Particle Simulation | Optical Illusion Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (770 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/optical-illusion-pro/id1617701694/reviews) |
| Number of ratings | **770** | 2 |
| Positive reviews | 89.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 189 MB | 35 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Gean dos Santos](https://appshunter.io/developer/1603653360) |

## 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


### Optical Illusion Pro

[App page](https://appshunter.io/ios/app/optical-illusion-pro/id1617701694)

Explore a collection of intriguing optical illusions and mind-bending images. Share these unbelievable visuals with friends and discover hidden details in everyday objects.

**Highlights:** Collection of optical illusions, Images with hidden details, Fun and intriguing pictures, Shareable visuals

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

**In-app purchases:** none


## Frequently asked questions

### Is Fluids & Particle Simulation free?

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

### Is Optical Illusion Pro free?

Optical Illusion Pro is free to download, with no in-app purchases.

### Which has better reviews, Fluids & Particle Simulation or Optical Illusion Pro?

Fluids & Particle Simulation is rated higher. Fluids & Particle Simulation averages 4.7 out of 5 from 770 ratings, while Optical Illusion Pro averages 3.0 from 2 ratings.

### Do Fluids & Particle Simulation or Optical Illusion Pro have ads?

Optical Illusion Pro shows ads; Fluids & Particle Simulation does not.

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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.*