understrap-child vs x

x is used by more websites in our catalog: 206 use understrap-child and 528 use x.

understrap-child sites have the higher median Ahrefs Domain Rating (understrap-child: 33, x: 25).

Between 2026-06 and 2026-07, understrap-child went from 0.03% to 0.02% of all tracked sites, while x went from 0.06% to 0.06%. x is gaining ground faster in our index.

No. A site runs a single WordPress theme, so understrap-child and x are mutually exclusive.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.