Apple's Notes (available both for OS X and iOS) has long been one of my most frequently used apps. With its improved cross-platform syncing in recent OS iterations, the app is better than ever. If I create a note on my iPhone while away from home, it's waiting for me on my Mac when I return--and vice versa. The Notes user interface is almost identical across platforms, making it especially easy to navigate between the two. That's why, whenever I want to jot down and store snippets of information, Notes is my go-to app.
These recovery hassles may be sufficiently onerous to convince you not to bother with Notes. If so, I understand. In my case, I have been using Notes for years and have never once lost any data. Maybe I'm lucky or maybe I'm just extra careful. Either way, given my successful track record, Notes remains my preferred choice for quick note taking.