Snapchat is tricky to monitor discreetly, especially on iOS; most legit parental-controls won’t give you full message access, but they can track usage, screen time, and alert you to risky activity. I settled on Eyezy after trying a few—it covers Android and iOS with keyword alerts and usage limits without going dark on you. If you decide to use it, have a transparent chat with your kid about safety and stay within your local laws.