The main purpose of this paper was to study the responsive web application designing method using Bootstrap and Foundation frontend frameworks. Moreover, the two frameworks were compared to choose the more productive and efficient one. As a result, a web-site for Daniel Mengistu law office was built and launched using the chosen framework. Even if there are frameworks with high-quality typography, forms, buttons, and other interface components, Bootstrap and Foundation are popular frontend frameworks. They are written in HTML, CSS, LESS, SASS and JavaScript which makes designing a user interface simple. Moreover, online tools and parameters were used to measure the project web-site’s loading speed, cross-browser compatibility, community, c...