Show me another app that has a dedicated, Mac, iPhone, iPad, AppleWatch version and can do everything that Day One can do and I might consider not subscribing. Oh and also that app would also have to have the web app (like Day One) will have later this year, and have the ability to have books made out of your journals like Day One has now. You'd be hard pressed to come up with that.
One Note for everything except having books made. Your welcome.