Technology can be leveraged as a tool to measure digital media use and eventually intervene including a mobile app to track child smartphone and tablet use, which revealed insights about problematic content often accessed on devices. Future studies could use mobile apps and help families set limits and change design features, to support healthier relationships with media with tailored precision and accuracy. Available for purchase at https://www.aap.org/Pediatrics-Collections-Digital-Media-Part-3-Use-of-Media-as-a-Tool-Paperback