Google authenticator! Have you ever written passwords for your gmails on paper? People walk by and steal the paper? Well here is an app that allows only you to get on your gmail. To sign in your gmail you need your gmail password AND the code!
A free texting app that allows you to text anyone with a phone! But calling isnt free. But there are special offers that ypu can do to get minutes! I use this so i dont have to give my real number out to people!
Another app that hides pictures! But this has two vaults. For if people ask for your password. Put the fake password and show them there is nothing in there or something thats not worth showing others!