# Fluids & Particle Simulation vs watAR

Fluids & Particle Simulation and watAR both sit at 4.7 stars, but that hides the real split: 90% of Fluids & Particle Simulation's written reviews are positive against 0% of watAR's. Fluids & Particle Simulation also leads on ratings volume (770 vs 11). watAR's advantage is in-app purchases (none vs 8) and update cadence (every 11 days vs monthly). On price, rating, ads and device support 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. watAR asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Fluids & Particle Simulation against 4.6 for watAR. That said, the two scores are not equally well evidenced: Fluids & Particle Simulation has 770 ratings behind it against 11, so its average is the more settled of the two. Written reviews are what separate them: 90% of Fluids & Particle Simulation's written reviews are positive against 0% of watAR's.

Fluids & Particle Simulation ships an update monthly, watAR every 11 days. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Fluids & Particle Simulation | watAR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (770 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews)** | [4.6 (11 ratings)](https://appshunter.io/ios/app/watar/id1546980861/reviews) |
| Number of ratings | **770** | 11 |
| Positive reviews | **89.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 189 MB | 1 MB |
| Requires iOS | **13.0** | 14.5 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Rare Realities, LLC](https://appshunter.io/developer/1571445940) |

## 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


### watAR

[App page](https://appshunter.io/ios/app/watar/id1546980861)

Transform real-world surfaces into dynamic water features using augmented reality. Add realistic waves and raindrops, interact with the effects, and capture unique images and videos.

**Highlights:** Augmented reality water effects, Wave and rain simulations, Interactive water effects, Capture images and videos, Adjustable effect scale, Hand/foot interaction with water (LiDAR required), Foreground occlusion (LiDAR required)

**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 watAR free?

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

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

Fluids & Particle Simulation is rated higher. Fluids & Particle Simulation averages 4.7 out of 5 from 770 ratings, while watAR averages 4.6 from 11 ratings.

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

Neither Fluids & Particle Simulation nor watAR shows ads.

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

Fluids & Particle Simulation ships an update monthly, and watAR every 11 days. Most recently, Fluids & Particle Simulation was updated on October 15, 2026 and watAR on October 6, 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.*