Background: Mindfulness-based interventions (MBIs) have grown in popularity in recent years and have been shown to reduce stress and increase quality of life among older informal carers. A digital application delivering MBIs has been iteratively designed based on user-centered designed principles and aims to support older informal carers to manage stress and sleep. We describe a qualitative study with older informal carers and the resulting digital application. Methods: A qualitative study with 20 older adults took place over a 2-year period.