Who is a handy caller ID and spam blocking app. It helps you identify and block all unwanted calls including telemarketers, robocalls, and other disturbances. It also has a community-based spam list that helps you stay safe.

With a premium service, you can use it to protect your phone numbers and email addresses. It also has a reverse phone lookup and background checks that include public records. The results are presented to you in a clean, easy-to-understand format.

You can use the app to search for people and phone numbers. The search results are presented to you in a list. You can also search by email address.