# Grass vs Atomus

The clearest difference is rating: Atomus at 4.8 against Grass's 3.7. Atomus also leads on update cadence (every 2 months vs every 95 months). Grass's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Atomus holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 202 and 528 respectively. Written reviews complicate that: 100% of Grass's written reviews are positive against 89% of Atomus's, so the app with the better star average is not the one people write more warmly about.

Grass ships an update every 95 months, Atomus every 2 months. Both last shipped on October 22, 2026.

## The numbers

| Metric | Grass | Atomus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (202 ratings)](https://appshunter.io/ios/app/grass/id417630059/reviews) | **[4.8 (528 ratings)](https://appshunter.io/ios/app/atomus/id1605327908/reviews)** |
| Number of ratings | 202 | **528** |
| Positive reviews | **100.0% of reviews** | 89.5% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 95 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 92 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CW&T](https://appshunter.io/developer/403622462) | [SungLab Inc](https://appshunter.io/developer/1691666995) |

## What reviewers say

### Grass

[App page](https://appshunter.io/ios/app/grass/id417630059)

This app simulates a field of grass that reacts to your breath, touch, and device orientation. Experience interactive breathing exercises, gentle wind simulations, and tactile feedback.

**Highlights:** Breath-guided breathing exercises, Microphone-controlled wind simulation, Compass-oriented field direction, Touch-based grass combing, Customizable scenes and wind intensity, Individual blade simulation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Atomus

[App page](https://appshunter.io/ios/app/atomus/id1605327908)

This app is an interactive visualizer that creates beautiful, dynamic art inspired by natural phenomena and abstract concepts. It offers customizable particle effects, multi-touch interaction, and music integration, designed to inspire creativity or provide a relaxing visual experience.

**Highlights:** 10-Finger Multi-touch Display, 5 Music Choices, Fastest Speed (60 FPS), 12,000 Particles, Customizable Particle Length, Number, & Size, 3-Color Modes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Relaxing and calming experience
- 🚀 Smooth and responsive
- 💡 Customizable particle effects
- 🔒 No ads or in-app purchases

**What reviewers complain about**

- 🐛 Occasional crashes or performance issues
- 💡 Limited color and customization options
- 🔋 Drains battery life quickly

**Reported bugs**

- Crashes when using more than 10 fingers
- Inconsistent ad frequency

**Requested features**

- More color and particle effect options
- Ability to turn off sound/music
- Haptic feedback support


## Frequently asked questions

### Is Grass free?

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

### Is Atomus free?

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

### Which has better reviews, Grass or Atomus?

Atomus is rated higher. Grass averages 3.7 out of 5 from 202 ratings, while Atomus averages 4.8 from 528 ratings.

### Do Grass or Atomus have ads?

Atomus shows ads; Grass does not.

### Which is updated more often, Grass or Atomus?

Grass ships an update every 95 months, and Atomus every 2 months. Most recently, Grass was updated on October 22, 2026 and Atomus 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.*