I’ve been using Day One since February 17, 2014, and I have 5,916 entries (although the majority of those are automated entries) in four journals. I’ve recorded everything from my daily routine to job changes to vacations in it.
When I read about the new premium service, I subscribed right away. It’s a valuable service that I use every day, and I want to see it continue for many years into the future, so it’s definitely worth the cost to me. It’s also a rock-solid, dead-simple way to keep a journal, and I strongly recommend it if you’re looking for such an app. The premium service is $49.99/year, but right now it’s discounted to $34.99 for new subscribers and $24.99 for current users of Day One 2.0.