Rikka — Shape the world's snow
Snowflakes from live weather
Only for iPhone
Free
iPhone
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.
Ratings & Reviews
Improved performance.
The developer, ONTRAILS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ONTRAILS
- Size
- 24.5 MB
- Category
- Graphics & Design
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © OnTrails