In my opinion, you should stay away from events that require downloading applications from the Internet, as this can be very dangerous and contain malicious programs that may lead to your device being hacked and your money being lost.
There are, of course, many events through which you can get some free money, but you have to be very careful because such events are frequented by scammers who ask you to download applications, request a connection to your wallet, or even obtain your private keys.