Monospace Writer comes out of beta, introduces new features
Monday, April 4, 2016 at 7:51PM 
If you’re in need of a writing app without the distraction on your Android device, the Monospace Writer app is something you must check out. The app just came out of beta and is now available for free to all Android users. The app now has a better tagging feature where all you need to do is add hashtags at the end of the note to help organize field. If you put in #encrypted, you can unlock this note via password or fingerprint, if your device supports it. New formatting options such as strikethrough, bullet, quote, and size-related options have been added as well.
The app also supports external keyboards and is said to be 8x faster and 99.8% crash-free. As mentioned, Monospace Writer is free but if you upgrade to Pro via an in-app purchase, you get things like Drive Sync, Customizable Typefaces, and a customizable Formatting Bar.
Source: Android Community | Download: Google Play Store (Free)