iAccessible helps organizations measure readability across large websites using temporal stratified sampling. The approach begins with a complete crawler inventory, groups pages by when they were created or last modified, randomly samples within each time-based group, and applies statistical weights so results represent the full website. Published by Revelo Software in July 2026, this technical whitepaper explains how organizations can produce defensible readability metrics while controlling analysis costs, monitoring recent publishing activity, and maintaining representative website-wide results.