Scarlet (previously Material Notes) offers a simple no hassle interface for adding notes in a beautiful material design.

☞ Offline by Default: Don't like companies storing your data no problem this note app can be used offline.
☞ Optional Cloud Sync: Optionally sync notes accross devices.
☞ Rich Note Input: Add rich notes - lists headings quotes and more.
☞ Tags: Add tags to your notes and find them easily
☞ Markdown Support: The text elements have markdown support
☞ Choice of Grid / List layouts
☞ Simple UX: Simplistic and straight forward UI.
☞ Archived Favourites and more
☞ Set color to your notes
☞ Night Mode: view notes in night mode for your eyes and screens
☞ Lock Notes: lock the notes with a pincode
☞ Ad Free: Now and always ad-free.
☞ Floating Heads: Quickly take notes while doing other stuff.
☞ Pinning and Sorting Notes
☞ Widget Support
☞ Open Source Project: Part of an open source project. Feel free to contribute to the project at https://github.com/BijoySingh/Material-Notes-Android-App