# Fluid Simulation vs Nuthin

The clearest difference is in-app purchases: Nuthin at none against Fluid Simulation's 15. Nuthin also leads on ads (none vs shown). Fluid Simulation's advantage is update cadence (daily vs every 2 weeks) and ratings volume (90K vs 5). On price, rating, review sentiment 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. Nuthin asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Fluid Simulation against 4.8 for Nuthin. That said, the two scores are not equally well evidenced: Fluid Simulation has 90K ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 96% of Fluid Simulation's written reviews are positive against 100% of Nuthin's.

Fluid Simulation ships an update daily, Nuthin every 2 weeks. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Fluid Simulation | Nuthin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (90K ratings)](https://appshunter.io/ios/app/fluid-simulation-antistress/id1443124993/reviews)** | [4.8 (5 ratings)](https://appshunter.io/ios/app/nuthin/id6744538535/reviews) |
| Number of ratings | **90K** | 5 |
| Positive reviews | 96.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 2 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 69 MB | 15 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Dobryakov](https://appshunter.io/developer/1443124992) | [Omer Yariv](https://appshunter.io/developer/1808049321) |

## 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


### Nuthin

[App page](https://appshunter.io/ios/app/nuthin/id6744538535)

This app challenges you to disconnect from your phone for extended periods. It offers a simple, ad-free experience with no scoring or social sharing to encourage genuine detachment.

**Highlights:** Phone detachment challenge, Ad-free experience, No score tracking, No social sharing, No login required, No data collection

**In-app purchases:** none


## Frequently asked questions

### Is Fluid Simulation free?

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

### Is Nuthin free?

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

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

Fluid Simulation is rated higher. Fluid Simulation averages 4.9 out of 5 from 90K ratings, while Nuthin averages 4.8 from 5 ratings.

### Do Fluid Simulation or Nuthin have ads?

Fluid Simulation shows ads; Nuthin does not.

### Which is updated more often, Fluid Simulation or Nuthin?

Fluid Simulation ships an update daily, and Nuthin every 2 weeks. Most recently, Fluid Simulation was updated on October 25, 2026 and Nuthin on October 21, 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.*