If you have found that you had any of these apps, Lookout suggests that you change your Apple account password. Also, be wary about any emails or prompts you receive that ask for sensitive information.
It's also always a good idea to enable two-factor authentication whenever possible. This requires people to have a second form of credentials, like a code from a text message, when they login to an account. Apple, Gmail, Twitter, and other apps and services offer two-factor authentication.