The Rotation Snap (Snap Angle, Rotation Constraint, etc.) is a new tool located on the right of the sidebar, allowing you to restrict or limit the number of rotational angles you can turn a shape.
Rotation Snaps are denoted by multiples: from 0x - 1x - 2x - 4x - 8x. 0x is pure pixelation; Blokoto’s default rotations allow up to 8x snaps, KoGaMa only 4x.
By constraining the order of rotational angles, you no longer have to worry about over- or undershooting your block angle while building. Although its uses may be limited, there’s one suggestion where it’ll come in handy… (Shape Tool)