Playing Online Without Installing Anything
Most people arrive at this format through a forwarded link and assume an install is required. It usually is not. The same operator that offers an app almost always runs a web build, and the web build is both easier to verify and easier to walk away from. For a first session that combination matters more than any convenience an app provides.
It is also the version that makes comparison possible. Because the payout multiplier is fixed and visible, a few rounds in a browser build give you a reference figure you can carry to any other copy of the game. When an installed version pays less for the same call, you have caught an edited client without risking anything beyond the time it took to look.
What Online Play Does Not Change
The odds. A browser round and an app round are settled by the same server with the same edge, so nothing about the delivery method improves your position. Claims that a particular site pays "better online" describe either a promotion with conditions attached or a build that is not being honest about its numbers.
If you are still working out how a round is settled in the first place, the mechanics are laid out on the big small game guide. And if you have decided you want the game on your phone after all, the download and apk notes cover what a legitimate install asks for and where the repackaged copies come from.