For me I have been journaling for 9 years with composition books. (Pen and paper) For a year I have transitioned to using Day One as my go to place to Journal and going paperless. There are many ways to expand the horizons of journaling. Day One offers features to expand those horizons. Although there are so many features I have found my use of Day One to be very simple, to write down my daily activity, and in a chronological fashion. There is simplicity here for just writing.
I find journaling much more rich and fascinating today. I like to try new systems like the bullet Journal with traditional composition books. In Day One I have multiple journals. I use IFTTT to send my social media into Day One. Day One has opened my world up to new possibilities. I love this app. I have used many other writing apps and find them useful. Day One remains my place for journaling.