The ornamental design for a smartwatch, as shown and described.
FIG. 1 is a top view of the smart watch according to the present disclosure;
FIG. 2 is a front view of the smart watch of FIG. 1;
FIG. 3 is a left side view of the smart watch of FIG. 1;
FIG. 4 is a perspective view of the smart watch of FIG. 1;
FIG. 5 is a bottom view of the smart watch of FIG. 1;
FIG. 6 is a rear view of the smart watch of FIG. 1;
FIG. 7 is a right side view of the smart watch of FIG. 1;
FIG. 8 is a perspective view of the smart watch of FIG. 1; and,
FIG. 9 is a perspective view of the smart watch of FIG. 1.
The broken line showing of structural features is included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.