Counter-up timers are also known as "time investment timers." If a person has to write a lot of content, they can use these timers to know when they should stop and when they should continue. For example, if it takes 30 minutes to write an essay and a timer is set for 45 minutes, the user knows that they need to be out by 45 minutes otherwise they will have to start over again.
These time investment timers have been used in many different ways such as competitive sports, education, law enforcement, human resources and more.