Effective App Blockers and Message Trackers for Kids

[Toporlaz]

My kids often download apps I don't approve of and spend hours texting. Are there app blockers that actually work without being too restrictive? How well do message trackers let you see their activity? Is there a reliable child contact management program to avoid unsafe contacts? I'd like suggestions from other parents who have found tools that combine app blocking, location tracking, and messaging oversight in a practical way.