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Name: Zen Brush
Compatibility: Android 2.2 and up
Zen Brush might look a little odd to start with, but the app acts like a sophisticated doodle pad -- allowing you to use ink brushes and pens to write, paint or draw whatever comes to mind. There's something soothing about using ink instead of a keyboard.
As a bonus, if you want to share your creation, you can watermark an image, save it and share over social media and email.
The free version is ad-supported, and the premium type can be purchase in-app.
Via: Google Play
Image credit: Google