Development of “Trashmart” Application for Used Materials Marketplace Based on Android

The goal of this research is to design an Android-based application to facilitate the sale and purchase of secondhand construction materials. This thesis' research methodology consists of two components: data collection and design. Using questionnaire evaluation, the literature review procedure, and analysis of similar apps, data was obtained. The design was modified using the waterfall methodology, and the Unified Modeling Language (UML) diagram was implemented. The evaluation is conducted in two ways: questionnaire evaluations and comparisons with similar applications. Those in search of used materials that correspond to their measurements and application preferences can benefit from the results that can be obtained