Does the App Give You Anything the Browser Does Not?
Honestly: stability, and nothing else. On a stable connection the two are indistinguishable, because both are drawing results calculated somewhere else. On a patchy connection the installed build handles a dropout better, reconnects faster and does not lose your session to an accidental tab reload. If your signal is reliable, the app is a convenience purchase paid for in permissions and storage.
The claims worth ignoring are the ones repeated in listing descriptions: higher payouts, exclusive lanes, faster withdrawals, better odds for new installs. None of these can be true of a client that does not decide outcomes. A listing advertising them is telling you about its honesty rather than its features.
Apps on a Shared Phone
An installed build leaves a launcher icon and usually a logged-in session. On a shared device that is a privacy problem before it is anything else — anyone who picks up the phone sees both that the app exists and, often, the balance inside it. The browser route leaves nothing beyond a history entry you can clear, which is why we suggest it by default for anyone whose phone is not exclusively theirs.
New to the game itself rather than to the install question? Start with the rules and stake tiers on the chicken roll game home page. If a link someone sent you is what prompted the install, read the official link checks first: most bad apps arrive through a bad link rather than a bad store.