Best app to track kids location without them knowing?

My 13yo has been going further and further on his bike and I’m getting anxious. I don’t want to tell him I’m tracking him because he’ll just uninstall it. What’s the most reliable way to do this without him knowing?

For a 13yo on a bike, I totally get the anxiety - but honestly the most reliable solution is just being upfront with him: “Hey, I’m your parent and I want to know you’re safe, so we’re using Life360/Google Family Link and that’s that.”

Kids that age respond better than you’d think when you frame it as safety rather than surveillance, and it saves you the cat-and-mouse game of him eventually finding and killing the app anyway.