Just a quick update. The latest version of the Android app has just been released (version 2.4.15).
There are a lot of optimizations and bug fixes, but the coolest feature is the new ability to take notes while offline. When you create a new note, the app will try to create it as normal. If no internet connection is available, it gets saved for later. Then, the next time you start the app, it will check for an internet connection again and upload the notes that were created offline. This also works with attachments.
With the ability to take notes offline, the app becomes a lot more useful in situations where an internet connect is not available, such in remote areas where you might find interesting plants or wildlife. It is also useful for places like museums which often have poor wifi (at least in my experience).