On Kik, you can delete individual messages or entire chats.
Individual Messages:
Pressing and hold the message you'd like to delete and tap Delete.
Deleting a message in your chat won’t delete it from your friend’s chat since all messages a stored locally on each device.
Entire Chats:
- Select the chat you want to delete
- iOS: Swipe and Delete
Android: Press and hold, and Delete Conversation
Deleting a group chat will also result in you leaving the group!
All Message History:
- Tap Settings
- Select Chat Settings
- Tap Clear Chat History
This will clear all messages from all the chats you have in your main chat list.