Srikanth Reddy 01 03 Since mobile computing is blending well with cloud services a new type of application called Mobile CloudApplications MCAs has become available and it needs to be designed carefully to take care of scalability problemssecurity and platform variety Unified Modeling Language UML is a standardized tool used to design a visual systemarchitecture behavior and interaction models and thus an effective model when creating MCAs The present paperinvestigates the question of how UML can be used during the development lifecycle of MCAs to promotecommunication between stakeholders provide systematic design as well as help identify design flaws before they areinstantiated in the system Developers can use the UML diagrams including use case class sequence and deploymentdiagrams in order to model both mobile frontend and the cloudbased backended components which makes theapplications more robust maintainable and interoperable Copyright (c) Journal of Engineering Technology and Sciences. All rights reserved 2026