In an interview with The Verge, Day One creator Paul Mayne talks journaling:
I think the idea of micro-blogging or short status updates based on popular social media sites, Twitter and Facebook, allows users to easily grasp the concept of Day One. It’s capturing personal thoughts and ideas in a way people are already familiar with, without having to share these writings publicly. It’s focused, it’s designed in a way that’s clean and not overwhelming, and it’s easily accessible in a way that makes the idea and motivation of keeping a journal fun.
It’s not as physical or tactile, but what is lost is more than made up in terms of what a digital journal on an iPhone is capable of. It’s always with you, it makes composing text by typing or by voice so fast and easy. And I’d say take photos of your sketches and scraps of paper using the Day One app camera. It will be preserved. I might also note that we are working towards vastly improved export features in Day One that will allow PDF creation and printing abilities of specifically chosen dates and entries, well formatted and designed to give users the ability to create a beautiful, tactile version of their journal data.
People today are busier than ever and rarely take even a minute to stop and reflect on the day. Formalizing the direction in one’s life is generally a trait of geniuses, and having a medium to do so is useful. Keeping these things private and expressing them without filters is liberating.
Apologies for the long blockquote, but I wanted to highlight the most pertinent stuff.
I’ve written many words about Day One (here and here), and I totally agree with what Mayne says above. The last portion is especially important, because it deals with how I use Day One: to reflect. As I’ve written, I love launching the app at the end of the night before bed and just writing a few sentences about my day. Some entries are longer than others, some with coarser language than others, but that’s okay. The appeal of Day One is that it’s freeing and therapeutic and private; it’s my place to say whatever. And I haven’t even mentioned all that Day One has to offer that appeals to my nerdy side. Lest I forget that it supports Markdown, iCloud sync, plain text exporting, and Avenir. Yet all this great stuff is secondary to the fact that Day One has got me journaling -- writing -- which trumps all else. Really and truly one of my most favorite apps.
Shame on you if you’re not using this app. You’re missing out on something truly fantastic.