We'll start with the bad news. Chrome doesn't currently support mobile extensions 🙄
Good news is you have options.
(1) Use mobile Safari to set Beni up on your phone. (Pro tip: try copying joinbeni.com/mobile-setup and pasting it in your Safari browser)
(2) Add Beni to your Chrome account and use it to shop next time you're on your computer. (Pro tip: you can add it to your Chrome profile directly from your phone)