"What gets measured gets improved." Measuring experienced wellbeing over the long-term is difficult, but it is an essential piece for evaluating social impact. Awhi Analytics is building a tool for measuring experienced wellbeing over time that offers youth development organisations a dual benefit: 1) real-time data that helps to decrease internal evaluation cycles allowing programme development to become more responsive and agile, and 2) an additional social impact indicator of experienced wellbeing so that organisations can better measure and demonstrate their positive social impact, secure more resources and grow their impact.