Ask five different parents about screen time limits by age and you’ll get five different numbers, most of them pulled from a chart they half-remember from a pediatrician’s waiting room years ago. The truth is messier and, honestly, more useful: the guidance itself has changed. If you’re still hunting for one clean hour-count to enforce at every age, the honest answer is that it doesn’t quite exist anymore — and understanding why will make you far less anxious about the whole thing.