This review focuses on the development of evacuation apps used in emergencies with the principal role of User-Centered Design (UCD). With intensifying dependence on technological growth, precisely emergency evacuation scenarios, these apps are helpful for their usage and design. This study sheds light on the importance of user experience by designing human-centric elements and integrating them into user experience. It is ensured explicitly that their accessibility and effectiveness during high-stress situations do not impact the app's functionality. Existing apps lack interface useability regarding human-centric approaches, present inconsistent information, and lack disability and demographic integration, causing a bad user experience. Incorporation of UCD principles of usability, user needs, and iterative design, the design of more inclusive and responsive apps meets these critical challenges identified in the review. The recommendations, thus provided, help improve functionality as well as usability. The objective of this paper is to support the development of user-friendly apps facilitating users during emergencies following an in-depth literature review of such apps being used in such scenarios.