# Fluid Simulation vs Emergency Big Red Button

The clearest difference is review sentiment: Fluid Simulation at 96% against Emergency Big Red Button's 0%. Fluid Simulation also leads on rating (4.9 vs 1.8) and ratings volume (90K vs 8). Emergency Big Red Button's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Fluid Simulation sells 3 one-off in-app purchases. Emergency Big Red Button asks for nothing beyond the download.

Fluid Simulation holds the better App Store score, 4.9 against 1.8. That said, the two scores are not equally well evidenced: Fluid Simulation has 90K ratings behind it against 8, 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 0% of Emergency Big Red Button's.

Fluid Simulation ships an update every 2 days, Emergency Big Red Button every 9 days. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Fluid Simulation | Emergency Big Red Button |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (90K ratings)](https://appshunter.io/ios/app/fluid-simulation-antistress/id1443124993/reviews)** | [1.8 (8 ratings)](https://appshunter.io/ios/app/emergency-big-red-button/id1559131785/reviews) |
| Number of ratings | **90K** | 8 |
| Positive reviews | **96.2% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 9 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 70 MB | 13 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Dobryakov](https://appshunter.io/developer/1443124992) | [JebteK, LLC](https://appshunter.io/developer/898038513) |

## What reviewers say

### Fluid Simulation

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

Experience a calming and mesmerizing visual journey with fluid simulations. This app helps relieve anxiety and promotes a sense of peace through interactive, flowing substances. It's designed to bring beauty and tranquility to your everyday life.

**Highlights:** Mesmerizing fluid simulations, Anxiety relief and calming experience, Interactive touch controls, Beautiful, high-quality visuals, Customizable settings, Satisfying and engaging gameplay

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fluid Simulation | $3.69 | one-time |
| Fluid Simulation | $23.00 | 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


### Emergency Big Red Button

[App page](https://appshunter.io/ios/app/emergency-big-red-button/id1559131785)

This app provides a quick and easy way to contact emergency contacts with a single tap. It sends an SMS with your GPS location and initiates a group call to up to five pre-configured numbers.

**Highlights:** One-tap emergency contact, SMS with GPS location, Group call initiation, Up to five emergency contacts, Customizable SMS message, Easy contact configuration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fluid Simulation free?

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

### Is Emergency Big Red Button free?

Emergency Big Red Button is free to download, with no in-app purchases.

### Which has better reviews, Fluid Simulation or Emergency Big Red Button?

Fluid Simulation is rated higher. Fluid Simulation averages 4.9 out of 5 from 90K ratings, while Emergency Big Red Button averages 1.8 from 8 ratings.

### Do Fluid Simulation or Emergency Big Red Button have ads?

Fluid Simulation shows ads; Emergency Big Red Button does not.

### Which is updated more often, Fluid Simulation or Emergency Big Red Button?

Fluid Simulation ships an update every 2 days, and Emergency Big Red Button every 9 days. Most recently, Fluid Simulation was updated on November 7, 2026 and Emergency Big Red Button on November 3, 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.*