There are a number of ways that you can monitor your child's Snapchat account without them knowing - but most of these methods come with a cost. If you're looking for a free way to monitor your child's Snapchat, then we recommend using mSpy. With mSpy, you'll be able to track all of your child's activity - including their snaps, chats, and even their location. Plus, mSpy offers a number of other features that can be used to keep an eye on your child's online activity - like social media monitoring and SMS tracking.