Adding voice or typed captions to iPhone photos for context

I think my question says it all. I would only add that because people take so many picures our photo libraries become the journals of our lives. Granted, back in the day when ticketing for sports events, movies, concerts and so on involved a physical, paper ticket and you could make a notation on the back, this was the norm for someone like me. Now, all these questions remain, our pictures left unexplained ... Who was I with when I went to that movie? Did I like it? Did we grab dinner before or after? Yadayada

[Re-Titled by Moderator]

Original Title: When you take a picture with your phone, can you voice or type in a caption? This would add to the date and time stamp, which doesn't really tell you much. This would be the equivalent of say a note on movie stub of who you went with, etc.