The embracing of digital technology has enhanced different approaches for authorities worldwide to deliver services to their citizens in a smart way. Smart government services contribute to increasing citizens' trust in government performance providing public services, as it allows interactions anytime, anyplace, through any device that merge digital technology and government public services. Furthermore, it is essential to consider citizens' trust in smart public services since citizens are consumers of the services. Existing studies measure citizens' trust in smart government services focusing on technological and government aspects. Therefore, this study proposes a framework to measure trust in smart government services and its impact on service adoption and satisfaction. This framework uses Information System (IS) Success Model and expands the dimension with government aspects, citizen aspects, citizens engagement, and social influence. This study surveyed the citizens of West Java Province Indonesia who have used government digital services for checking and paying vehicle taxes. The findings revealed significant factors, which are technological aspects, government aspects, and citizens engagement to measure citizens' trust in smart government services. The more citizens trust the services, the more they will use these services. Trusted smart government services also deliver value and satisfaction to the service users. However, we found social influence and the citizen aspects are not supported the citizens' trust in smart government services. We believe this paper will be a significant contribution for the academicians, governments, and service providers to build or increase citizens' trust in smart government services.

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Public sectors are increasingly adopting emerging technologies to innovate and deliver smart services to enhance citizens' overall well-being. Although the idea of smartness in public sector service innovations has been explored from the perspective of service providers, limited study has been done from the perspective of end users. Furthermore, the impact of smart service delivery on citizens' quality of life has been widely studied quantitatively, but qualitative evidence has been sparse. This paper aims to address those research gaps using a mobile-based innovation in the motor vehicle annual registration services (SAMBARA) recently introduced by the West Java Province in Indonesia as a case study. We use a qualitative smartness measurement framework based on efficiency, effectiveness, transparency, and collaboration metrics to assess the smartness of the service. We also evaluate the service's influence on enhancing citizens' overall quality of life using the well-being framework, which is based on aspects of usefulness, safety, and convenience experiences. We verified the significance of our findings across various participants' background using statistical analysis ANOVA. The outcome of the study shows that mobile-based innovation services not only create smartness in public service delivery but also improve citizens' well-being regardless of their various backgrounds. This research contributes to the public service innovation knowledge base and offers a baseline study for researchers and practitioners to carry out similar study in other emergent nations like Indonesia.INDEX TERMS Public sectors, public service delivery, innovation in public services, smartness in service delivery, smart government, citizens' well-being, citizens' quality of life, SAMBARA.