You can put a virtual protractor using AR technology that can be placed on a desk or the floor.
When you launch the app, please move your iPhone left and right to recognize the surrounding space.
Touch the screen to locate where you want to place the virtual protractor, then horizontal and vertical protractors will be displayed at the point you selected.
You can turn the virtual protractors left or right with your finger on the screens. You can move protractors horizontal position with two fingers scroll, and vertical position by three fingers scroll.
The protractors are anchored to the surrounding feature point with an AR Anchor.
Push "Relocate" button to put new protractors.
Push "Grid" button to display horizontal grid to align protractors to edge of room or desk.