TopOpt
Education
Free · Designed for iPad. Not verified for macOS.
New release 2026 - version 3.0 is here! Interactive topology optimization in real time: stiff structures, compliant mechanisms, bone-like infill and stress constraints.
TopOpt is an interactive topology optimization app from the TopOpt group at the Technical University of Denmark (DTU). Place loads and supports, and the optimized structure appears and updates in real time while you edit.
Two problem types:
• Minimum compliance: the stiffest structure for a given amount of material
• Compliant mechanisms: a force inverter and a gripper, with input and output ports and their springs
Both can be extended with:
• A local volume constraint for bone-like porous infill
• A von Mises stress constraint, with the stress field shown on the design
• The robust formulation, which makes the design insensitive to its members being made thinner or thicker
Further features:
• Presets: MBB beam, L-bracket, cantilever and femur, and force inverter and gripper for mechanisms
• Up to six loads and three load cases, and scaled loads
• Loads, supports and ports are moved by dragging their symbols, and loads and ports can be rotated
• Passive solid and void regions, and flexible void regions that the optimization may move
• Custom grid size, sharpness and filter radius
• Export of the design as an STL file for 3D printing
The same app runs on iPhone, iPad, macOS, Windows and Linux. A user guide with tutorials is available on the TopOpt homepage.
Version 3.0 is a complete rewrite.
• Compliant mechanisms: force inverter and gripper
• Local volume constraint for bone-like infill
• Stress constraint with the stress field shown on the design
• Robust formulation (eroded and dilated designs)
• Flexible void regions
• New presets, including a femur
• Loads, supports and ports are grabbed by their symbols, and loads and ports can be rotated
• New user guide with tutorials
The developer, DTU Mechanical Engineering, 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
- Niels Aage
- Size
- 53.5 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © 2026 Technical University of Denmark (DTU)