Robin: Solenoid Designer
Magnet design and field maps
$3.99 · Designed for iPad. Not verified for macOS.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Little Beast Software B.V., 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Little Beast Software B.V.
- Size
- 9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Little Beast Software B.V.
