Abstract: 【Purpose/significance】The massive popularity of smart APPs makes APP interaction the norm for users to complete their daily search, but their search behavior paths need to be clarified. Exploring the pathways of users' daily search behavior from the per⁃ spective of APP interaction helps further to reveal the rules of mobile users' search behavior and examine the mechanism for APP in⁃ teraction search behavior.【 Method/process】204 young users' impressive APP interaction search process were collected in real daily situations. In order to obtain the APP types, intra-APP search actions, and inter-APP transfer intentions used in their search process through open coding; to categorize intra-APP search action transfer sequences and inter-APP transfer sequences according to APP types; to take APP types as the entry point, to combine statistical analysis and the research is carried out in two aspects: intra-APP search action path and intent-driven inter-APP transfer path.【 Result/conclusion】"Query-Browse-View" is the primary search path within APP. Still, the search action path within APP has prominent APP-type characteristics, manifested in the search action transfer focusing on the query process or the utilization of search results; the transfer path between APPs shows the "core-edge" pattern with community APP as the core. The inter-APP transfer path shows a "core-edge" pattern with community APP as the core. The similar APP transfer mainly includes community and shopping. The inter-APP transfer tends to be driven by complementary and bridging in⁃ tentions, but the inter-APP transfer of the same type is prominent for the contrast intention. In contrast, the inter-APP transfer of dif⁃ ferent types has clear communication and frustration. 【Innovation/limitation】 This study systematically reveals the whole picture of intra-APP and inter-APP behavioral paths in users' daily searches. Further, it analyzes the intention pattern driving inter-APP trans⁃ fer, which provides a basis for improving APP interactive search services.