Normalized kernel density estimates of the stellar mass distributions for red-giant stars in the APOKASC 3 (top) and APO-K2 (bottom) samples. Each KDE is split by evolutionary stage, with the left side (orange) showing RGB stars and the right side displaying core-helium burning stars. The latter are further divided into RC (teal) and 2RC (purple) stars, separated at 1.8 M_⊙. Distributions are shown for the full sample and several binary candidate subsamples identified by the TBO, NLAC, and Binary Union Flag (BUF) for APOKASC 3 and RUWE for APO-K2, as well as the rapid rotator subset in APOKASC 3. Dots and vertical bars indicate the median and interquartile range (25^th–75^th percentiles) for each population. Horizontal orange and teal lines mark the median RGB and RC stellar masses of the respective full samples.