I hope it's not totally off to ask on a reader forum about wringing and taking notes.
My favorite simple, but powerful note taking app on Android has been Draft:
http://lifehacker.com/draft-is-a-cle...port-844836670
But the author might have some issues (who am I to know?), she just keeps adding to and remove it from the Play Store. (For example, I downloaded from the store a few months back, now you can only find it on the shady sides of the Internet but hey, it's a free .apk. Version 0.13 anyways)
What I liked about it is I could add a simple text file from local storage. Though not on the latest version I have (0.13) but on some earlier versions, I was also able to save a text file to local storage.
One of the main drawbacks of Android in general is the lack of strong offline backup support, as compared to the Apple ecosystem.
Still, I hope at least some individual apps can do that. What are your recommendations, possibly past version 0.13?