They have greenish-yellow skin with orange-red to dark red blushes, dotted with white.
Inside, the apple has firm, coarse-grained, crisp, juicy off-white flesh, slightly green under the skin. It is aromatic, with a brisk, sweet flavour.
The fruit ripens in September; November at higher altitudes.
This is not the same as a variety of apples called Nickajack (aka Joaneting, aka Carolina), which originated in England before the 1600s. That English Nickajack apple is small with greenish-yellow skin and does not store well.
Nickajack Apples originated near Nickajack Creek, Macon County, North Carolina, United States, possibly being grown by the Cherokee Indians.