D counter is a simple counting tool. You can count in single steps (1,2,3,...) or in multiples of steps (2,4,8,10,.... or 10,20,30,....)While counting upwards, you have the option of fixing a maximum cap.You can do a countdown also.Countdown can be in single steps (10,9,8,,...) or in multiple of steps (100,95,90,...., or 100, 98, 96, 94,..., or 100, 90, 80, ...).This tool can be used for counting in sports, in gyms, while measuring anything, etc.