Revealing how companies influence us, our brains, our behaviour, our emotions. How they use science to ensure we're more engage in 'the infinite scroll' on our smartphones. And tech insiders teach us how to curb the urge to constantly stay connected. David Common went to California to talk to an app developer about how companies keep us hooked on our phones. We track a family's device usage over several months and reveal their staggering results - from the 8 year old son, the teenage daughters to the parents. Plus, David Common gets wired up. We test how his cognitive efficiency changes when he hears that familiar "ping" on his phone