We claim the ornamental design for a releasable smartphone leash, as shown and described.
FIG. 1 is a perspective view of a releasable smartphone leash;
FIG. 2 is an alternate perspective view thereof;
FIG. 3 is right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front elevational view thereof; and,
FIG. 8 is rear elevational view thereof.
Broken lines in FIG. 1 are used to illustrate an example smartphone and smartphone protector connected to the releasable smartphone leash; broken lines in FIG. 6 and FIG. 8 are used to illustrate unclaimed portions of the releasable smartphone leash; broken lines for no part of the claimed design.