Google Family Link is 100% free. There are no feature upgrades or premium features that you can access with a membership. All you need is a Google account for you and your child, and you can use all its features. However, it’s important to note that just because it’s free doesn’t mean it’s good. You’ll get much better monitoring tools and filters with a premium app like Qustodio, which you can try at no risk with their proven 30-day free trial.