Get started by clicking the + on the top right of the start screen then choose your picture. Double tap to add a node, first 3 nodes create a triangle, after that each node will create a triangle from the closest edge. You can change the insertion mode, display mode, node action(delete, join) and save from the pull over panel to the left.
.svg are saved to the Triangulate folder on your internal storage.
Note: This is in somewhat of a beta form, may crash or do something funky and isn't very intuitive
This app has access to :