A device provides user interfaces for displaying messages in a messaging application. The device receives a plurality of messages from a first participant within a time interval and determines whether the plurality of messages meets message grouping criteria. In accordance with a determination that the plurality of messages does not meet the message grouping criteria, the device displays a plurality of separate bounded message areas representing the plurality of messages. In accordance with a determination that the plurality of messages meets the message grouping criteria, the device displays a single group bounded message area representing the plurality of messages.