# Robin: Solenoid Designer

> Magnet design and field maps

Canonical page: [https://chrome-stats.com/d/id6799057947](https://chrome-stats.com/d/id6799057947)

## Overview

- **ID:** `id6799057947`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Little Beast Software B.V.
- **Category:** Education
- **Version:** 1.0
- **Last updated:** 2026-08-28
- **First published:** 2026-08-28
- **Size:** 8.60 MB
- **Data as of:** 2026-09-16
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/robin-solenoid-designer/id6799057947)
- **Website:** [https://rat-gui.com/robin](https://rat-gui.com/robin)
- **Privacy policy:** [https://rat-gui.com/robin/privacy-policy.html](https://rat-gui.com/robin/privacy-policy.html)

## Description

Design solenoid magnets on the go: live geometry, field maps, inductance and harmonic analysis. All on-device, no account and no internet needed.

Robin is a complete design app for axisymmetric solenoid magnets. It allows you to go from a first geometry sketch to field maps, inductance, and harmonic analysis, and it runs entirely on your iPhone or iPad.

Build a magnet from stacked coil sections, each with its own dimensions, turns, and current. A live geometry preview keeps the cross-section in front of you while you iterate, and every project is saved on your device. No account, no cloud — it runs completely offline.

DESIGN
• Create magnets from any number of coaxial coil sections
• Live cross-section preview with real dimensions and true proportions
• Work in mm, cm, m, inches, mils, or feet
• Per-project length units, light and dark theme

FIELD
• Full B(r,z) field maps: Br, Bz, and |B| on a configurable grid
• Fast native solver for interactive recalculation
• Pan and zoom the field slice; adjustable display and resolution

ANALYSIS
• Self- and mutual-inductance matrix for all coil sections
• Coupling matrix and total stored magnetic energy
• Zonal harmonic coefficients for field-quality work

PROJECTS
• Unlimited projects, stored locally with instant switching
• CSV import and export for coil geometries
• A built-in sample project to start from

Robin is built for physicists, magnet engineers, and students who want real magnetostatics in their pocket. The solver is a native C++ compute core validated against closed-form solutions. A full field map takes moments, not minutes.

Everything stays on your device. Robin collects no data and never connects to the internet.

## Rankings

- #1,793,248 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6799057947)