WhatsApp Messenger

Free (IAPs)

NEEDS iOS 11.4 or later

iMessage is great for texting on iPhones, but you need another option for cross-platform chat, and WhatsApp is the best. You can speak one-to-one or create a group – or set up a giant group that serves partly as a chatroom. You can mute conversations that get out of hand, and control what you receive. It’s impressively flexible. Oh, and it does voice and video calls.