Parents need to know that Secret – Speak Freely is a social-media app that’s designed to let people voice whatever’s on their mind without anyone being able to know who said it. The app promises anonymity, but that’s a tough promise to keep in the long term in the online world. Because it is seen as anonymous, though, people voice all sorts of thoughts, some showing longing for a significant other, some admitting their sexual orientation when they feel they can’t in the real world, and some lauding sex, alcohol, drugs, or violence. Despite the site’s promise of anonymity, the app demands that users supply their email addresses and phone numbers so it can match them with their friends (though you don’t know who’s posting what).