VARIETY LENGTH OF WEB PAGE DESIGN FRAME: Provide 400 Mobile Device UI / UX Design templates with different length layouts to help capture your design idea without limitationNO GRID LINE: no grid line for freely design without idea blockingVIEWPORT GUIDELINE - Providing Device viewport guidelineSAVE MONEY & TIME - Using this sketchbook will help save you money by prototyping your User Interface on paper instead of spending hours to write code or paying a developer to create a prototypeFAIL FAST LEARN FAST: quickly prototype your apps to support fast usability test and learn user insight faster