# Spooky the Ghost vs Fluids & Particle Simulation

The clearest difference is price: Fluids & Particle Simulation at Free against Spooky the Ghost's $0.99. Fluids & Particle Simulation also leads on update cadence (monthly vs every 40 months) and device support (4 vs 2). Spooky the Ghost's advantage is in-app purchases (none vs 8). On ads there is nothing between them.

Fluids & Particle Simulation is free to download; Spooky the Ghost costs $0.99 up front. Fluids & Particle Simulation sells 8 in-app purchases, starting at $2.99 per 7 days. Spooky the Ghost asks for nothing beyond the download.

Spooky the Ghost ships an update every 40 months, Fluids & Particle Simulation monthly. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Spooky the Ghost | Fluids & Particle Simulation |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.7 (770 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews)** |
| Number of ratings | — | **770** |
| Positive reviews | — | 89.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 189 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [JS Digital Productions, Inc.](https://appshunter.io/developer/1012108950) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### Spooky the Ghost

[App page](https://appshunter.io/ios/app/spooky-the-ghost/id1471356285)

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

**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 Spooky the Ghost free?

Spooky the Ghost costs $0.99, with no in-app purchases.

### Is Fluids & Particle Simulation free?

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

### Do Spooky the Ghost or Fluids & Particle Simulation have ads?

Neither Spooky the Ghost nor Fluids & Particle Simulation shows ads.

### Which is updated more often, Spooky the Ghost or Fluids & Particle Simulation?

Spooky the Ghost ships an update every 40 months, and Fluids & Particle Simulation monthly. Most recently, Spooky the Ghost was updated on October 12, 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.*