Screened Out review –screentime doc knows how to press your buttons

Parents of locked-down kids might be advised to steer clear of this compulsive look at the smartphone and its ruinous effects

With this enthusiastic, info-taining documentary Jon Hyatt runs the risk of stating the bleeding obvious by elaborating on facts everyone is already aware of: staring at your phone for too long is bad for your mental health, evidence is growing of the harmful impact of screens on children's brains, tech companies design apps to exploit our cravings (and get hold of our data). Hyatt pushes his folksy voiceover too far - Gee, do I love my phone" - as he goes cold turkey from social media (and cuts his kids' screen time), but he's an affable presence.