The man who built an app to compare supermarket food prices

Amid the increasing cost of living spiraled higher through the pandemic and inflation that followed, Aucklander Roc Wong got to thinking. Maybe there was a way to compare the costs of various products at different supermarkets? So the software developer got to work - building an online tool to do just that. In his spare time. It's called Grocer - and it's free. Roc joins Kathryn to explain how it works.