The design of this tally counter took door supervisors into consideration. Door Supervisors keep track of customer numbers using "Clickers" tally counters. The Tally Counter will always be with you in this handy app. Through the use of this app's age verification feature, admission dates for those who are 25, 21, and 18 years old will allow you to remember what age they must be to be allowed entry. IC codes are readily available for quick access for radio communications or any report writing. No additional math is needed because this program computes net count, from total out, and total in.