# Harena — Falling sand, 165 materials

> Falling sand, 165 materials (iPhone/iPad app by SATOSHI MAEDA.)

- Source: https://appshunter.io/ios/app/harena/id6804989976 (this page in markdown: same URL + `.md`)
- Developer: [SATOSHI MAEDA](https://appshunter.io/developer/6781611869)
- Category: Games, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 84 MB
- Languages: American English, Japanese
- Released: 2026-09-23
- Data updated: 2026-09-24
- User reviews in markdown: https://appshunter.io/ios/app/harena/id6804989976/reviews.md

## What is Harena?

- 165 materials: sand, water, lava, acid, metals, gases, plants, creatures. 32 of them are made only by reaction
- Grids up to 2048 x 1152, 2.36 million cells, every cell simulated
- Heat: every material has a melting, boiling and ignition point, and latent heat
- Reactions have a temperature window, and each one you find is logged in the codex
- Four views: material, thermal, velocity and air flow
- Electricity: wire, battery, diode, lamp, and heat, cold and wind sensors
- Optics and magnetism: laser, mirror, prism, two magnets, pump
- Wind and pressure: smoke, spores and ash are carried by the air
- Creatures and vehicles, including a character you steer yourself
- Six starting worlds, ten save slots, undo, pinch to zoom and pan. Landscape only, playable offline


## Version history (last 1 release)

### 1.0.0 — 2026-09-23

No release notes.

## More apps by SATOSHI MAEDA

- [ごほうび貯金](https://appshunter.io/ios/app/id6781711026)
- [TuneWake](https://appshunter.io/ios/app/tunewake/id6782069792)
- [のみどき](https://appshunter.io/ios/app/id6782375556)
- [ReverseSaver](https://appshunter.io/ios/app/reversesaver/id6782624671)
- [HighPowerReminder](https://appshunter.io/ios/app/highpowerreminder/id6782924157)
- [Kinkajou](https://appshunter.io/ios/app/kinkajou/id6795396182)

All apps by SATOSHI MAEDA: https://appshunter.io/developer/6781611869

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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 2026-09-24.*