Today Bloom Built has released a major upgrade for DayOne iOS and Mac apps. This is DayOne 2 and is a paid upgrade on both platforms.

Download the new Dayone 2 Apps:

Download DayOne 2 For iOS
Download DayOne 2 For Mac

The old version has been renamed to Dayone Classics and are available here:

Download DayOne Classic For iOS
Download DayOne Classic For Mac