One question on this subject, answered from our own work, with the numbers.
Dubit designs, builds and researches apps for children's emotional wellbeing and health. For Embers the Dragon, an app supporting children's emotional wellbeing and school readiness, Dubit's role covered app design and development, and co-design and research. In the Embers the Dragon programme, 75% of families scored above clinical thresholds for concern around parental anxiety and child resilience before using it, and 2% after.