  Designing theory-driven digital health interventions is a challenging task
that needs support. We created a guide for the incomers in the field on how to
design digital health interventions with case studies from the Cancer Better
Life Experience (CAPABLE) European project. The guide explains how behaviour
change theories can inform customisation and personalisation of the
intervention. The proposed SATO (ideaS expAnded wiTh bciO) design workflow is
based on the IDEAS (Integrate, Design, Assess, and Share) framework and is
aligned with the Behaviour Change Intervention Ontology (BCIO). We provide a
checklist of the activities that should be performed during intervention
planning as well as app design templates which bundle together relevant
behaviour change techniques. In the process of creating this guide, we found
the necessity to extend the BCIO to support the scenarios of multiple clinical
goals in the same application. The extension utilizes existing classes and
properties where possible.
