The majority of mobile apps are free-to-play and so include 
a variety of forms of advertising and other mechanisms for 
monetization.In-app advertising and purchasing 
have been studied with adults but, to-date, younger users
have received comparatively little consideration despite 
their increased susceptibility to manipulation. This paper 
addresses the gap in research by creating the ADD (App 
Dark Design) framework which brings together insights
from practitioners, theory from existing related research,
and the findings from a user study which gathered 
qualitative data from 39 girls aged 12-13 years.