This two-volume set LNCS 15802-15803 constitutes the refereed proceedings of the 13th International Conference on Distributed, Ambient and Pervasive Interactions, DAPI 2025, held as part of the 27th International Conference on Human-Computer Interaction, HCII 2025, in Gothenburg, Sweden, during June 22-27, 2025. The total of 1430 papers and 355 posters included in the HCII 2025 proceedings was carefully reviewed and selected from 7972 submissions. The two volumes cover the following topics: Part I: Designing and developing intelligent environments; and user experience in intelligent environments. Part II: Smart cities and public spaces; eXtended reality and robots in intelligent environments; and wellbeing in intelligent environments.