Let me line up some great options and actually compare the damage to your wallet.
Boomerang
Android-focused and cheap as chips. A single device is about sixteen dollars a year, and the Family Pack covers up to ten devices for roughly thirty-one dollars a year. You get screen schedules, web filtering through its safe browser, location, and on Android, text and app monitoring plus uninstall protection. iOS is stripped down thanks to Apple, so this shines on Android.
Canopy
This one is the content filter specialist. It uses AI image recognition to block explicit visuals in real time across any browser, and it flags sexting. Pricing is tiered, about eight dollars a month for three devices, ten dollars for five, and sixteen dollars for ten. The tradeoff is it does not do per-app time limits or heavy device management, so it is a filter, not a full suite.
Kroha
Feature-rich and goes past basic screen time. App blocking, web filtering, location, geofencing, social chat monitoring, YouTube supervision, even eye protection reminders. Works on both iOS and Android. Good for parents who want visibility without buying three separate tools.
KidLogger
The budget detailed monitor. It has a free tier, tracks browsing history across Chrome, Firefox, Safari, and Opera, logs calls and SMS on Android, and does location with history. The interface looks like it time-traveled from an older era, and iOS support is basically location only, but the price is unbeatable.
Quick money math. If you have one Android kid on a tight budget, Boomerang at sixteen a year wins outright. If explicit content is your main fear, Canopy is worth the higher monthly cost. If you want the widest feature spread across mixed devices, Kroha earns it. And if you are broke but want logs, the KidLogger free tier does the job.
My pick for value: Boomerang for Android households, full stop. The per-device pricing scales beautifully, and you are not locked into a fat monthly fee like the flashier names charge.