This document discusses how developing mHealth (mobile health) systems can help improve quality of healthcare, especially in low and middle income countries. It describes D-tree International's work developing decision support tools for frontline health workers using mobile phones. An example from Malawi helped community health workers better identify and treat childhood illnesses like pneumonia through a guided mobile app for assessments, referrals, stock management and reporting. Lessons learned stressed the importance of involving local stakeholders, adapting to existing systems, and ensuring technology supports - rather than drives - health programs.