Why Downloads Dominate the Searches
Because the format arrives through phones rather than websites. Someone is sent a link, plays a few rounds, and immediately looks for an app on the assumption that the installed version is the real one. In practice the web build is what the operator maintains directly, and the apk is the layer where copies insert themselves between you and them.
That single misconception explains most of the harm in this category. Nobody sets out to install an edited client — they set out to find "the official app", and the edited client is what ranks for that search when it is distributed aggressively enough.
iOS, Region Blocks and Configuration Profiles
Three recurring themes deserve direct answers. Native builds for iPhone are rare in this category, and pages promising them frequently deliver a configuration profile instead — which grants far more control than an app does and should be refused. A build unavailable in your region is unavailable for a reason that sideloading does not fix; the restriction reappears at the withdrawal stage. And an "old version" download solves nothing that a current build has broken.
If you have not decided between installing and staying in a tab, the browser versus app comparison lays out the trade properly. For the round the app merely displays, see the format breakdown.