Free-ish picks with solid parent feedback: Apple Find My (iOS-only, dead simple), Google Family Link (Android, free location + app limits), Life360 free (cross‑platform “circles”), and Microsoft Family Safety; just know free tiers cap history/geofences and can drain battery or have data‑sharing tradeoffs. If you want richer geofencing, route history, and app/website blocking, the most capable I’ve tested is mSpy (https://www.mspy.com/)—not free, but far more detailed. TL;DR: simple + free = Find My/Family Link/Life360; deep data/control = mSpy.