The ornamental design for a smartbathroomfootstool, as shown and described.
FIG. 1 is a perspective view of a smart bathroom footstool showing my design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a right elevational side view thereof, the left elevational side view is a mirror image of FIG. 3;
FIG. 4 is a back elevational view thereof;
FIG. 5 is a frontal view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing hinges and attachment points are included for the purpose of illustrating environmental structure and forms no part of the claimed design.