TraceBin: Gridfinity Bins

Lay a tool on a sheet of paper, take one photo, and TraceBin builds a gridfinity bin with a pocket cut to that tool's outline. Set the clearance and height, check the 3D preview, and share the STL to your slicer. Everything happens on your iPhone; the photo never leaves it, and there is no account to create. No markers to print, no credits to buy, no account, no upload. Free at launch, then one price, unlimited bins. - Works with US Letter or A4 paper as the only scale reference. No calibration card or marker sheet. - Handles dark and shiny tools: a torch for dim rooms and two ways of separating the tool from the paper. - Clearance from 0.3 to 1.5 mm, bin heights from 2u to 6u, pocket to the floor or a fixed 12 or 8 mm. - Flat insert mode makes a shadow-board slab at the exact size of your drawer. - Binary STL that opens in Bambu Studio, PrusaSlicer, OrcaSlicer, and Cura. - History keeps every bin you exported so you can share it again. - Print the built-in test coupon to dial in clearance for your printer. It is a 9 g, 20 minute print. One tool per photo. Bins follow the gridfinity spec: 42 mm grid, 7 mm height units, standard feet.