A journal is a book of poems expressing your thoughts, feelings, emotions, fears, and personal dreams and achievements. In a diary, you typically write about what you dd that day. In a journal, however, you could write about a single occurrence of an event, or how the event made you feel. On the other hand, many people keep diaries for multiple purposes.
For example, most weight loss programs require you to keep a food diary or a list of everything you ate that day. Along the same lines, an exercise diary is something else you can keep. This way, you can look at your progress from day to day and see how strong you are. Journals are more free flowing, as they do not require editing. You can even get creative and put photos in it, sketches and poems.