HandWrite Pro is a note-taking app for your finger or stylus, but it is also an advanced vector-based drawing app. Smooth writing and drawing is enabled using the “Scribmaster” drawing engine.
You can either use your fingertips, an active pen (e.g. the stylus from the Samsung Galaxy Note series) or a passive pen. The vector graphics engine allows you to zoom in without pixelation or losing quality. If you use a stylus you can set the "stylus only" option so that your wrist won't accidentally draw lines. The app also allows you to export your work for refinement on a PC later.
The app allows you to write or draw during lectures and meetings. Export to PDF afterwards to share your work.
The simple and intuitive user interface makes writing or drawing as easy as on paper. Just give it a try. Most of the features are available for free!