ps : this is btckan official app, they are pretty popular in China
So your saying any app on the apple store cannot be a virus? Please remove your post and don't mislead people.
I also reread your first post, the app wants your username and password! That is a huge red flag because now they have all your information (including access to 2FA). Regardless of who this is and how popular they are, if they decide to be malicious or get hacked, all of a sudden all your information is compromised.
Def do not download this app.
Practically every damn app for iPhone involving bitcoin mining asks for a damn user name and password. So, I simply deleted the app from my phone. Pissed me off I had to pay for the damn app only to find out they wanted that info. Do NOT trust those apps that want that info... period!!!