Key Features

◽ Create handwritten notebooks
◽ Organize notebooks inside libraries
◽ Put hot accessed notebooks in a bookshelf
◽ Format pages via flexible format options
◽ Import PDFs as notebooks
◽ Snapshot from PDFs to handwritten notebooks
◽ Export any notebook or a complete library
◽ Export local backups of all application state
◽ Share part of page or all notebook with others

For an economic and simpler version, you can consider Master Note - Classic Edition

https://play.google.com/store/apps/details?id=com.masternuts.nota