This policy covers the TopOpt apps from the TopOpt group at the Technical University of Denmark (DTU):
TopOpt (the interactive 2D app) for iPhone, iPad, macOS, Windows and Linux, and TopOpt 3D.
No data is collected. The apps do not collect, store or transmit any personal data or
usage data. They contain no analytics, advertising, tracking or crash-reporting services, and they do not
connect to the internet. They do not need an account or a login.
Data on your device. All computations run on your own device. Designs exported for
3D printing (STL files) are saved only where you choose in the system's save dialog, and they never
leave your device unless you share them yourself.
Children. The apps collect no data from anyone, including children.
Changes. If this policy changes, the new version is published on this page with
a new date.
Contact. Questions about this policy can be sent to Niels Aage,
naage@dtu.dk, Department of Civil and Mechanical Engineering, Technical University of Denmark.
Last updated: 29-10-2026.