This app helps you create the net of regular tetrahedrons / hexahedrons from existing images

You can choose a single or multiple images and cut down regular triangles or squares as materials to form the net

The idea comes from the chinese holiday Dragon Boat Festival(端午節). On that day people eat a special kind of rice dumplings called Zongzi(粽子), which is a regular tetrahedron in shape. I found it hard to make a net like that on the phone.

Special credit:
Icon made by Freepik from www.flaticon.com