# Rikka — Shape the world's snow — Snowflakes from live weather

> Generates real-time hexagonal crystals from live global snow weather data. (iPhone/iPad app by ONTRAILS.)

- Source: https://appshunter.io/ios/app/rikka-shape-the-worlds-snow/id6736791492 (this page in markdown: same URL + `.md`)
- Developer: [ONTRAILS](https://appshunter.io/developer/1570756171)
- Category: Graphics & Design, Photo & Video
- Price: Free
- Rating: 3.50/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 23 MB
- Languages: English, Japanese
- Released: 2024-10-10
- Data updated: 2026-07-17
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/rikka-shape-the-worlds-snow/id6736791492/reviews.md

## What is Rikka?

Tap the screen and watch a hexagonal cellular automaton grow a breathtaking, six-fold symmetric crystal in real time. Weather data is pulled live from snowy cities around the world — and every crystal takes its shape from the snow falling somewhere on Earth right now.

Temperature →Complexity — The colder the place, the more intricate the branching
Humidity → Density — Higher humidity spreads side branches more densely
Wind → Variation — Stronger winds create irregular, one-of-a-kind forms
Pressure → Ripple patterns — Lower pressure introduces ring-like modulations

No two crystals are ever the same. Nature decides the shape. The algorithm draws it.
The city whose weather inspired each crystal is shown on screen — and you can always find it on a map.

## Key features

- Real-time crystal growth simulation
- Live global weather data integration
- Crystals shaped by temperature, humidity, wind, and pressure
- Unique, six-fold symmetric designs
- Origin city identification and mapping
- Algorithmically generated natural art


## Frequently asked questions about Rikka

### What kind of graphics does Rikka use?

Rikka utilizes hexagonal cellular automata to grow intricate, six-fold symmetric crystals in real-time. The complexity and density of these crystals are directly influenced by live weather data.

### Does Rikka have ads?

Yes, Rikka contains advertisements. As a free application, ads are displayed to support its development and continued operation.

### How does Rikka determine crystal shapes?

The app pulls live weather data from snowy cities worldwide. Temperature affects complexity, humidity influences density, wind creates variation, and pressure introduces ripple patterns, all shaping the unique crystal.

### Can I see where the weather data for my crystal comes from?

Yes, Rikka displays the city whose weather inspired each crystal on the screen. You can also find this city on an interactive map within the application.

### What devices does Rikka support?

Rikka is currently supported on iPhone and iPod devices. It is designed for iOS mobile platforms.

### What is the age rating for Rikka?

Rikka has an age rating of 4+. This indicates it is suitable for children aged 4 and above, with no mature content.

### How often is Rikka updated?

The latest version of Rikka is 1.0.87, last updated on May 9, 2026. While specific update frequency isn't detailed, this indicates active development.

### What is the user rating for Rikka?

Rikka has a user rating of 3.5 stars based on 2 ratings. This suggests a mixed reception from its current user base.

## Version history (last 5 releases)

### 1.0.87 — 2026-05-09

Improved performance.

### 1.0.84 — 2026-03-23

Improved performance.

### 1.0.83 — 2025-11-07

Improved performance.

### 1.0.82 — 2025-11-07

Improved performance.

### 1.0.8 — 2025-11-06

Added snowfall mode.

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All apps by ONTRAILS: https://appshunter.io/developer/1570756171

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-17.*