The iMessage you know and love has an all-new design, supercharged with a ton of new features and new ways to stay connected with the people you care about most.
What can I do with iMessage?
• Messaging made awesome: More than just text. Send photos, videos, voice messages, emoticons, Mojis and more. You can also respond to any message from your contacts with reactions.
• Supercharge your chats with Add-Ins**: No more switching back and forth between apps. Easily share content using Add-Ins without leaving iMessage.
• Great for groups: Add your favorite people and start chatting. Use groups to plan together, play together, for staying in touch or just for hanging out.
• Call everyone - iMessage, mobiles and landlines: Free* video and voice calls make it easier to stay connected with friends and family. You'll also enjoy low calling rates to mobiles and landlines worldwide with iMessage.
• Never miss a moment with quick capture: Quickly swipe to capture photos and videos. Make them your own by adding emoticons, stickers and annotations.
• Share Highlights: Keep others updated with Highlights from your day. React to any highlights with awesome emoticons or send a private message about that highlight. Your highlights only stay visible for 7 days to your followers.
*iMessage to iMessage calls are free. Operator data charges may apply. We recommend using an unlimited data plan or WiFi connection.
** Add-In availability will vary by country/region.
Upgrading to the new iMessage may result in the deletion of content from older conversations.
To save photos and videos that were previously sent or received in an older version of iMessage, save that content to your camera roll/photo gallery before upgrading to the new iMessage.

Check here for more information on iMessage for Windows