Phone tracking may be legal for parental control when it is used by a parent or legal guardian to monitor a child's device for safety, supervision, or family protection. However, it should still be limited to lawful and authorized use.
The key factors are the child's age, who owns the device, whether location tracking is involved, what data is collected, and whether the monitoring could capture private communications. Tracking another adult, partner, employee, or someone else's phone without proper authorization can create serious legal risks.
For parental control, the safer approach is to keep phone tracking safety-focused, avoid excessive data collection, and review state-specific rules on consent, location tracking, recordings, and communications access.