You mean when DayOne has a sync conflict? That depends on the method of syncing, I guess, which is different between DropBox and iCloud as far as I know. If I remember correctly, in iCloud the conflicting file will be ignored, while in Dropbox you'll have two entries. None of these is perfect I admit. If that's important to you, I'll look into it and we can come up with a well-defined behaviour for that, just open an issue on https://github.com/maebert/jrnl/issues !