# Fluids & Particle Simulation vs Rock identifier. Crystal guide

The clearest difference is review sentiment: Fluids & Particle Simulation at 90% against Rock identifier. Crystal guide's 13%. Fluids & Particle Simulation also leads on rating (4.7 vs 4.1) and ratings volume (777 vs 113). Rock identifier. Crystal guide's advantage is update cadence (every 4 days vs monthly). On price, ads, in-app purchases and monetization model 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 and Rock identifier. Crystal guide sells 2 in-app purchases, starting at $14.49 per month. Whichever you choose, the download price is not the number that matters.

Fluids & Particle Simulation holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Fluids & Particle Simulation has 777 ratings behind it against 113, so its average is the more settled of the two. Written reviews point the same way: 90% of Fluids & Particle Simulation's written reviews are positive against 13% of Rock identifier. Crystal guide's.

Fluids & Particle Simulation ships an update monthly, Rock identifier. Crystal guide every 4 days. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Fluids & Particle Simulation | Rock identifier. Crystal guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (777 ratings)](https://appshunter.io/ios/app/fluids-and-particle-simulation/id1532653221/reviews)** | [4.1 (113 ratings)](https://appshunter.io/ios/app/rock-identifier-crystal-guide/id1591512914/reviews) |
| Number of ratings | **777** | 113 |
| Positive reviews | **89.6% of reviews** | 12.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 189 MB | 145 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Dmitriy Beloglazov](https://appshunter.io/developer/1591512916) |

## 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


### Rock identifier. Crystal guide

[App page](https://appshunter.io/ios/app/rock-identifier-crystal-guide/id1591512914)

Identify rocks, crystals, and stones using your phone's camera. Explore a comprehensive reference encyclopedia and manage your personal collection. Discover the world of geology with this intuitive guide.

**Highlights:** Photo identification of rocks and crystals, Reference encyclopedia, Collection tracking, Gem and stone identification, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crystal Identifier. 1 month. | $14.49 | per month |
| Premium - Year | $24.49 | per year |


## Frequently asked questions

### Is Fluids & Particle Simulation free?

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

### Is Rock identifier. Crystal guide free?

Rock identifier. Crystal guide is free to download, with in-app purchases available.

### Which has better reviews, Fluids & Particle Simulation or Rock identifier. Crystal guide?

Fluids & Particle Simulation is rated higher. Fluids & Particle Simulation averages 4.7 out of 5 from 777 ratings, while Rock identifier. Crystal guide averages 4.1 from 113 ratings.

### Do Fluids & Particle Simulation or Rock identifier. Crystal guide have ads?

Neither Fluids & Particle Simulation nor Rock identifier. Crystal guide shows ads.

### Which is updated more often, Fluids & Particle Simulation or Rock identifier. Crystal guide?

Fluids & Particle Simulation ships an update monthly, and Rock identifier. Crystal guide every 4 days. Most recently, Fluids & Particle Simulation was updated on October 23, 2026 and Rock identifier. Crystal guide on October 22, 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.*