The aim of this project is to design the interface for a smartphone-based health and usage monitoring system (HUMS) system for predictive maintenance of trucks. The project aims at supporting users who own small-scale fleets (less than five trucks). Due to the large number of these small businesses, designing for this sector will enable supporting the digitalization of a sector that is not generally considered the main focus of digital India campaigns. However, this sector plays an important part in the economy, and digitalization will help in getting maintenance done at the right time. Thereby, improving the efficiency of the trucks reduces the cost of maintenance for owners and, as a consequence, reduces overall pollution in the long run. In order to design for this population, a user study was conducted with truck owners, drivers, repairmen, and spare parts dealers to understand the trucking ecology in Salem, Tamil Nadu. Based on insights from user studies, various concepts for the interface for a Minimum Viable Product were explored, which were then translated into two prototypes. Due to the situation of the lockdown, actual user testing was not possible. Hence, these prototypes were tested with student peers, and a final version was detailed.