# Gravity vs Rainy Relax 4K

The clearest difference is in-app purchases: Gravity at none against Rainy Relax 4K's 2. Gravity also leads on iOS requirement (8.0 vs 15.0). Rainy Relax 4K's advantage is update cadence (every 3 months vs every 8 months) and price ($0.99 vs $1.99). On ads and device support there is nothing between them.

Gravity costs $1.99 and Rainy Relax 4K $0.99 up front. Rainy Relax 4K sells 2 in-app purchases, starting at $0.99 per month. Gravity asks for nothing beyond the download.

Gravity ships an update every 8 months, Rainy Relax 4K every 3 months. The most recent releases landed on November 10, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Gravity | Rainy Relax 4K |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[4.7 (50 ratings)](https://appshunter.io/ios/app/gravity-light-particles-manipulation-app/id621399551/reviews)** | — |
| Number of ratings | **50** | — |
| Positive reviews | 87.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 39 MB | 59 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod, Apple TV | iPhone, iPad, iPod, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Kfirapps Limited](https://appshunter.io/developer/1131751327) | [KISSAPP, S.L.](https://appshunter.io/developer/552812711) |

## What reviewers say

### Gravity

[App page](https://appshunter.io/ios/app/gravity-light-particles-manipulation-app/id621399551)

Explore a unique blend of music, art, and science with this interactive experience. Guide flowing particles with multiple fingers to create stunning visual animations. Save your creations and experiment with various settings for a relaxing and artistic journey.

**Highlights:** Multitouch particle control, 10 distinct finger-based animations, Thousands of particles at 60 FPS, Customizable colors and animation settings, Save and load presets, Multiple play modes, Save snapshots to photo library

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Mesmerizing and beautiful graphics
- 🧘 Calming and relaxing experience
- 😌 Therapeutic and stress-relieving
- 🎶 Pleasant and tranquil music
- 🤩 Visually intriguing and psychedelic

**What reviewers complain about**

- 🐛 App crashes on opening
- 🔇 No sound issues
- 💸 Disruptive ads in free version
- ✋ Too many fingers freeze patterns
- ❓ Unclear functionality for some

**Reported bugs**

- App crashes as soon as it opens
- No sound
- Full screen ads in free version
- Ads in paid version
- App control doc keeps hiding

**Requested features**

- Support for new iPhone screens
- Option to record performances
- More music selections or ability to generate original music
- Ability to use as wallpaper
- More particle options (count, size)


### Rainy Relax 4K

[App page](https://appshunter.io/ios/app/rainy-relax-4k/id6737191959)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rainy Relax Full Version | $0.99 | per month |
| Rainy Relax Full Version | $9.99 | per year |


## Frequently asked questions

### Is Gravity free?

Gravity costs $1.99, with no in-app purchases.

### Is Rainy Relax 4K free?

Rainy Relax 4K costs $0.99, and also offers in-app purchases.

### Do Gravity or Rainy Relax 4K have ads?

Neither Gravity nor Rainy Relax 4K shows ads.

### Which is updated more often, Gravity or Rainy Relax 4K?

Gravity ships an update every 8 months, and Rainy Relax 4K every 3 months. Most recently, Gravity was updated on November 10, 2026 and Rainy Relax 4K on October 30, 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.*