Get the app
The CEO is played in the app — it is the bank, the referee and the memory, and every player holds their own screen. There is no browser version, because one engine is what stops two phones disagreeing about the rules.
Looking for the build…
Android will ask twice
This is not from the Play Store yet, so Android treats it as coming from an unknown source. Tap the downloaded file, allow this browser to install apps when asked, then install. You only answer that once.
Nobody types an address
The app already knows where the table server is. One person starts a game and shows a code; everybody else taps Join a table and points a camera at it.
On an iPhone? Not yet. The app is written once and runs on both, but an iOS build has to be signed and distributed through Apple, which is a separate piece of work rather than a separate codebase.