Hey there! I’ve tested tons of free Android monitoring apps with my kids, and honestly, most free ones are pretty limited or sketchy. Google Family Link is decent for basics - does screen time and location okay, but the web filtering is hit-or-miss. I tried this with my son last week and he found ways around it pretty quick.
For real peace of mind, Parentaler is worth every penny - it catches everything the free apps miss and actually works reliably. Stay away from those random “free spy apps” - they’re usually malware or sell your data.