The ornamental design for an interactive weightscale, as shown and described.
FIG. 1 shows a top view of an interactive scale;
FIG. 2 shows a front view thereof;
FIG. 3 shows a left side view thereof;
FIG. 4 shows a right side view thereof;
FIG. 5 shows a rear view thereof;
FIG. 6 shows a bottom view thereof;
FIG. 7 shows a isometric view thereof; and,
FIG. 8 shows a left side view thereof with hidden lights and a display illustrated in dotted lines.
The dashed lines are for the purpose of illustrating portions of the interactive weight scale and form no part of the claimed design. The dotted lines on the surface portions indicate contour and not surface decoration.