Work Classic App Training Jon Young September 13, 2018 20:19 Updated Follow For first-time Skilljar users click Register, enter your information then click Sign Up. Related articles Work Mobile App Video New Work Mobile App Webinar How do I answer Job Start/Finish Questions on Work Mobile? How do I invoice a task? What is the difference between Work Classic App and Work Mobile App? Comments 0 comments Please sign in to leave a comment.