# RSO vs Fluids & Particle Simulation

The clearest difference is in-app purchases: RSO at none against Fluids & Particle Simulation's 8. RSO also leads on rating (5.0 vs 4.7). Fluids & Particle Simulation's advantage is update cadence (monthly vs every 13 months) and ratings volume (770 vs 1). On price, ads 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. RSO asks for nothing beyond the download.

RSO holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Fluids & Particle Simulation has 770 ratings behind it against 1, so its average is the more settled of the two.

RSO ships an update every 13 months, Fluids & Particle Simulation monthly. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | RSO | Fluids & Particle Simulation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rso/id1124344057/reviews)** | [4.7 (770 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews) |
| Number of ratings | 1 | **770** |
| Positive reviews | — | 89.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 189 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Nu Media Tech LLC](https://appshunter.io/developer/958350284) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### RSO

[App page](https://appshunter.io/ios/app/rso/id1124344057)

This app connects individuals with a faith-based organization focused on community health and well-being. It aims to foster unity and address health disparities through mobile engagement.

**Highlights:** Community connection, Faith and health programs, Addressing health disparities, Mobile engagement, Promoting unity

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 RSO free?

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

### Is Fluids & Particle Simulation free?

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

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

RSO is rated higher. RSO averages 5.0 out of 5 from 1 ratings, while Fluids & Particle Simulation averages 4.7 from 770 ratings.

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

Neither RSO nor Fluids & Particle Simulation shows ads.

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

RSO ships an update every 13 months, and Fluids & Particle Simulation monthly. Most recently, RSO was updated on October 4, 2026 and Fluids & Particle Simulation on October 15, 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.*