Participants and inclusion criteria
Participants were eligible for participation when meeting the following requirements: (1) self-reported age of 18 years and older, (2) sufficient German language skills, (3) self-reported enrollment in university or college, (4) internet access, (5) ability to use a smartphone. As there is no clinical diagnosis of procrastination and in order to include students significantly suffering from it a cut-off value based on a recent study [Interested students were invited to conduct an eligibility screening on the StudiCare website. In case of eligibility, participants had to give their informed consent online via double opt-in. Subsequently, they were invited to the baseline assessment.