Rikka — Shape the world's snow
iOS app by ONTRAILS. Graphics & Design · ONTRAILS
- Store rating
- 4 / 5
- Store rating count
- 3
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.0.89
- Listing last refreshed
- 2026-09-12
View the original store listing
Store description excerpt
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.
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