When it comes to software or mobile application development, it is only possible to make it successful with the help of a good architecture and the principles that govern it. It has been found that applications that use the principles of architecture are good at scalability, maintainability, availability, interoperability, and so on. The development of mobile applications should be based on SOLID principles which leads to high-quality code without any additional effort on the part of the developer. The architecture process focuses on the design of both functional and non-functional requirements for a system. By designing the architecture of a system, one can gain a deeper understanding of the bigger picture of the system as a whole. Well-designed architecture and principles play a critical role in enabling developers to build scalable and high-quality applications.