Yes, there are plenty of notes apps out there, in varying amounts of quality and cost, and odds are that you already have some notes saved up somewhere on your iOS device (for me, it's right there in the official Notes app). But every once in a while, an app comes along that's just so simple and elegant it's worth a look anyway, and that's the strangely named Note.S. This is a really beautiful notes app that's set up as a daily journal, so you can track, from day to day, what you're trying to remember and note on any given day.
As you can see above, the interface is simple and clean -- there are just a few icons across the bottom, and then the rest of the screen is yours to fill up however you wish. You can add photos or a map to your notes, change fonts as necessary, or even save or export your notes out to Dropbox, email and a few other options.
This isn't the kind of app that demands you to use it in a certain way -- it's the app that you download, use a few times and then create your own usage patterns for it. The "daily journal" element is very interesting -- each note is filed by date and time, so as you enter more and more notes into the app, you can get a nice scope of your life as it goes on. It's not as robust as Day One, but it isn't supposed to be.
Anyway, if you've already got a notes solution, this one might not make you look twice -- there are plenty of great notes apps out there that offer more features. But Note.S is a solid app currently available at a launch price of US$1.99.