Start with built-ins: Snapchat Family Center (see who they’ve chatted with, manage safety/reporting, no message content) plus iOS Screen Time or Android Family Link for app limits, content filters, and location sharing via Find My/Family Link. For cross-platform extras, Bark (risk alerts; fuller Snapchat insights only on Android), Qustodio and Norton Family (time limits/web filtering/app blocking), or mSpy on compatible devices can help—note that on iOS, third-party apps can’t read Snapchat messages due to Apple’s restrictions. If you share the child’s device model and OS version, I can give exact setup steps for Snap Map privacy, communication limits, and location sharing.