This final report presents a comprehensive analysis of digital tools, particularly those leveraging artificial intelligence (AI), that support regulatory simplification and consistency across the EU legislative cycle. Building on extensive desk research and expert consultation, the study surveys current practices and innovative applications of eTools at the EU, Member State, and relevant third-country levels. The report maps the use of digital solutions throughout all stages of the policy cycle, including ideation, development and evaluation. Special attention is given to tools that enhance the efficiency, transparency, and accessibility of regulation. The findings highlight best practice in the technical implementation and practical deployment of digital and AI-based tools, evaluating their utility in supporting 'better regulation' objectives. The report concludes with a set of policy options and use cases for the adoption and further development of eTools within the EU context, assessing their feasibility, effectiveness, and alignment with EU policy goals. By offering a reasoned evaluation of the most promising approaches, this study aims to inform policymakers and support evidence-based decision-making for future regulatory innovation and simplification.