Where to Use Kali Linux?

Hello,

I'm new to this blog but I like too much the tutorials, but I have a question, I want to have a portable way to carry kali linux, I tried a chrome book but it is a little big, so I tried in a raspberry pi but its not the portability that I search, then I try to boot a kali Linux from android but I don't now how to make that, so please if you have another way or you now how to boot kali Linux from android please help.

Thankyou