Lens Thickness Calculator is a utility app available on Android that helps users determine the thickness of spherical monofocal lenses based on their prescription for glasses. The app offers a range of features including calculations for lenses made from 7 different materials with varying refractive indices. Users can also determine the thickness of astigmatic lenses at different cylinder angles, account for lens curvature, and specify thickness at the edge or center. Additionally, the app allows for calculating lens diameter based on frame measurements, provides a glossary for parameter clarification, supports multiple languages including Ukrainian, Russian, and English, and enables sharing results on social networks. Users can also compare multiple lenses simultaneously.