This is the only solution atm and it sucks. It might work with a few trustworthy friends but leave your device open at a party as music station and it's way to

This is the only solution atm and it sucks. It might work with a few trustworthy friends but leave your device open at a party as music station and it's way to convenient for someone to "accidentally" open the email-app and instantly see all your private emails. All that's needed is an app-lock and you could use this workaround. You make all your private apps password protected and guests can only use the browser.