This study analyzes the factors affecting the intention of using mobile applications (apps) for room-sharing in Vietnam. The research model is inherited and developed based on the unified theoretical model of technology acceptance and use (UTAUT2) by the specific conditions of Vietnam. The analysis results from 346 users show that the intention to use mobile apps for room-sharing services in Vietnam is influenced by expected benefits (i); expected effort (ii); social influence (iii), hedonic motivation (iv), trust (v), and perceived security (vi). Expected benefits, hedonic dynamics, and expected security have an important influence on the using intention among these factors; thus, application providers need a valuable solution to enhance the functionality of their applications on these aspects to meet the customers' increasing requirements.