When I was looking for a journaling app, I almost selected
As Noted. It has a beautiful minimalist interface and you can insert inline images in your notes. It's a plain text tool, which for me is a plus. Text formatting features usually distract me from writing and ask me to make choices I don't want to worry about. The only feature I want is inserting images (and I don't want them cropped).
When I first tried it, the app was extremely buggy, but it seems to have improved. Although just now, as I was playing with it, it crashed and I lost a note I had just written. Also, I don't think you can change the date of an entry, which is something I often do, for instance when I scan a paper journal page or a document relating to an event, I will change the entry date to the date of the event or the date I wrote the page.
You can sync using Dropbox, and they have a Chrome extension that you can use to update your journal from the web, I haven't tried it. They claim you can import Kindle highlights from your Amazon account, but I can't find the menu to do that.
One last thing, the app is free, which is not good. I'd like to know what their business model is.