Carolyn Nicole had a nice post on why a digital journal has its advantages over a traditional paper journal.
I liked her point that a digital journal is always with you. For me, that also means I can search and read a digital entry whether at work, home or on the road. I love my paper journals, but also love combining the two.
Day One is my go to app for journaling. By all means, give it a try and see what you think about digital journaling.