iPad and iPhone synchronization issue

I’m having difficulty setting up my iPad. I’m logged into the same Apple ID on both my iPhone and now iPad, but I don’t want apps that I downloaded on the iPad to also appear on my iPhone. I also don’t want the safari to be shared on both my devices, that includes research history. But I still want both devices to be logged on the same Apple ID, I don’t want to create a new one for another device. How do I desynchronize my devices only not to share safari and App Store while still having them logged onto the same Apple ID?

thanks!