Proceed with caution
Whats App allows users to send messages back and forth via an Internet connection. It has become the most popular transcontinental (mainly Europe) messaging app due to it not necessitating a cellular connection.

In-depth breakdown

Minimum Age Requirement
Messaging Capabillities
WhatsApp allows video chat, one-on-one text chat, and group text chats.
Location Sharing
WhatsApp offers a ‘Share Location’ feature, which allows users to share their location in a one-on-one chat and group chat.
Parental Controls
Limited to blocking users from contacting the account. Apple or Android parental controls can be used at the device level.
Users of the app have the ability to set it so that only saved contacts have the ability to message them.