# Fluid Simulation vs iRis

The clearest difference is rating: Fluid Simulation at 4.9 against iRis's 4.3. Fluid Simulation also leads on ratings volume (90K vs 10) and review sentiment (96% vs 75%). iRis's advantage is in-app purchases (none vs 15) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Fluid Simulation sells 15 in-app purchases, starting at $1.00 per 7 days. iRis asks for nothing beyond the download.

Fluid Simulation holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Fluid Simulation has 90K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 96% of Fluid Simulation's written reviews are positive against 75% of iRis's.

## The numbers

| Metric | Fluid Simulation | iRis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (90K ratings)](https://appshunter.io/ios/app/fluid-simulation-antistress/id1443124993/reviews)** | [4.3 (10 ratings)](https://appshunter.io/ios/app/iris-vision-through-vr/id1446528453/reviews) |
| Number of ratings | **90K** | 10 |
| Positive reviews | **96.2% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 70 MB | 43 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Dobryakov](https://appshunter.io/developer/1443124992) | [Thomas Warren](https://appshunter.io/developer/987169219) |

## What reviewers say

### Fluid Simulation

[App page](https://appshunter.io/ios/app/fluid-simulation-antistress/id1443124993)

Engage with mesmerizing fluid dynamics simulations on your device. This app offers a visually stunning and calming experience, perfect for stress relief and relaxation. Explore swirling liquids and gases with simple touch controls.

**Highlights:** Interactive fluid dynamics, Stress relief and calming experience, Gorgeous visuals, Simple touch controls, Liquid, gas, and water simulation, Psychedelic and trippy visuals

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fluid Premium | $1.00 | per 7 days |
| Fluid Premium | $3.00 | per month |
| Premium | $4.99 | per year |
| Fluid Premium | $6.00 | per month |
| Fluid Premium | $10.00 | per year |
| Premium | $0.49 | one-time |
| Particles | $0.99 | one-time |
| Particles | $1.99 | one-time |
| Fluid Premium | $3.00 | one-time |
| Fluid Simulation | $3.69 | one-time |
| Fluid Premium | $20.00 | one-time |
| Fluid Simulation | $23.00 | one-time |
| Discount | $29.99 | one-time |
| Fluid Premium | $30.00 | one-time |
| Fluid Simulation | $33.00 | one-time |

**What reviewers like**

- 🌈 Beautiful and mesmerizing visuals
- 🧘‍♀️ Calming and relaxing experience
- 👍 Intuitive and easy to use
- 🎨 Customizable settings and presets
- ⭐️ High-quality graphics and animations

**What reviewers complain about**

- 💰 Premium features locked behind paywall
- 🔒 Limited customization options in free version
- 🐛 Occasional crashes or performance issues
- 📱 Smaller screen size can make controls tricky

**Reported bugs**

- Subscription issues and inability to access premium features
- Crashes or freezes when changing certain settings

**Requested features**

- Ability to save and share custom presets
- Option to change background color
- Slower animation speed for more control
- Integration with music or audio playback
- Support for larger screens and TVs


### iRis

[App page](https://appshunter.io/ios/app/iris-vision-through-vr/id1446528453)

This app enhances vision by adding contrast to images, making text easier to read. It works with any VR headset that supports camera input and is compatible with iOS devices.

**Highlights:** VR headset compatibility, Image contrast enhancement, Grayscale vision mode, Improved text readability, iOS 8 and up support

**In-app purchases:** none


## Frequently asked questions

### Is Fluid Simulation free?

Fluid Simulation is free to download, with in-app purchases available.

### Is iRis free?

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

### Which has better reviews, Fluid Simulation or iRis?

Fluid Simulation is rated higher. Fluid Simulation averages 4.9 out of 5 from 90K ratings, while iRis averages 4.3 from 10 ratings.

### Do Fluid Simulation or iRis have ads?

Fluid Simulation shows ads; iRis 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.*