What's the best Android app to block adult websites and monitor texts for my teenager?

Qustodio Parental Control App is a comprehensive tool for parents seeking to filter web content and monitor communication on a child's Android device. It distinguishes itself by applying its filtering rules to all internet browsers, not just Google Chrome, which is a noted limitation of some free alternatives. For monitoring texts, the app scans for specific keywords that may indicate danger or bullying and sends immediate notifications to the parent's dashboard. The system also alerts parents when new apps are installed. A significant strength is its reported reliability in blocking adult websites; user reviews consistently mention it has never failed to stop such content from getting through, a critical point for parents who have had prior negative experiences. However, the setup process can be technical and time-consuming. Furthermore, the subscription model receives criticism for being expensive and potentially confusing, with some users reporting that essential features are locked behind higher payment tiers after an initial purchase. While powerful, the cost may lead some to seek more affordable options.