# Fluid Simulation vs Quiet Time

The clearest difference is ads: Quiet Time at none against Fluid Simulation's shown. Quiet Time also leads on rating (5.0 vs 4.6). Fluid Simulation's advantage is ratings volume (712 vs 4) and update cadence (weekly vs every 5 weeks). On price, in-app purchases, monetization model and iOS requirement there is nothing between them.

Both are free to download. Fluid Simulation sells 4 in-app purchases, starting at $4.99 per 7 days and Quiet Time sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Quiet Time holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Fluid Simulation has 712 ratings behind it against 4, so its average is the more settled of the two.

Fluid Simulation ships an update weekly, Quiet Time every 5 weeks. The most recent releases landed on September 20, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Fluid Simulation | Quiet Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (712 ratings)](https://appshunter.io/ios/app/fluid-simulation-magic-fluids/id1555635445/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/quiet-time-countdown-timer/id6755136351/reviews)** |
| Number of ratings | **712** | 4 |
| Positive reviews | 77.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 138 MB | 77 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Viacheslav Khakhulin](https://appshunter.io/developer/558806761) | [Stephen Peck](https://appshunter.io/developer/1849181578) |

## What reviewers say

### Fluid Simulation

[App page](https://appshunter.io/ios/app/fluid-simulation-magic-fluids/id1555635445)

Transform your screen into a relaxing oasis with interactive fluid art, mesmerizing particle effects, and calming music. Engage in guided breathing exercises to reduce stress and enhance mindfulness. Customize your experience to create a personal sanctuary for relaxation and creativity.

**Highlights:** Mesmerizing fluid art creation, Dazzling particle and kaleidoscope effects, Soothing ambient music and soundscapes, Guided mindful breathing exercises, Customizable colors, intensity, and speed, Save creations as wallpapers

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $9.99 | per month |
| Yearly | $29.99 | per year |
| Premium | $34.99 | one-time |

**What reviewers like**

- 🌈 Relaxing and calming effects
- 🎨 Beautiful visuals and fluid dynamics
- 🕰️ Engaging to pass the time
- 🧘‍♀️ Helps with stress relief and meditation

**What reviewers complain about**

- 💰 Excessive ads and paywalls
- 🔌 Issues with app updates and compatibility
- ⏱️ Limited free usage time

**Reported bugs**

- App crashes or freezes after updates
- Notifications and ads causing disruptions

**Requested features**

- Ability to customize the visuals and audio
- Offline mode for use without internet connection
- More ASMR-like features for enhanced relaxation


### Quiet Time

[App page](https://appshunter.io/ios/app/quiet-time-countdown-timer/id6755136351)

This app provides a unique countdown timer that automatically resets when it detects noise. It's designed to help children stay quiet during routines and adults maintain focus during meditation or work. Enjoy peaceful moments with a simple, distraction-free interface.

**Highlights:** Automatic noise-triggered reset, Child-friendly interface, Focus and meditation timer, Distraction-free design, Configurable countdown lengths, Privacy-focused, no ads or tracking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |


## Frequently asked questions

### Is Fluid Simulation free?

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

### Is Quiet Time free?

Quiet Time is free to download, with in-app purchases available.

### Which has better reviews, Fluid Simulation or Quiet Time?

Quiet Time is rated higher. Fluid Simulation averages 4.6 out of 5 from 712 ratings, while Quiet Time averages 5.0 from 4 ratings.

### Do Fluid Simulation or Quiet Time have ads?

Fluid Simulation shows ads; Quiet Time does not.

### Which is updated more often, Fluid Simulation or Quiet Time?

Fluid Simulation ships an update weekly, and Quiet Time every 5 weeks. Most recently, Fluid Simulation was updated on September 20, 2026 and Quiet Time on June 1, 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.*