Teacher's Clock saves all teachers and lecturers the continuos look at the watch, because this look is felt by both students as well as all other listeners as rude and unprofessional. Instead a discrete side view on the smartphone laying on the table informs at any time over the remaining classrooms or lecture time.
A completely new, combined countdown signals the teacher - also over a greater distance - by color-changing circular segments at what stage his lesson is currently.
Teacher's Clock is complemented by a permanent on-screen schedule and the alphanumeric display of the remaining class time. The operation and configuration are intuitive and self-explanatory and absolutely easy even for inexperienced smartphone users.