It is a convenient app with various functions related to age, such as calculating age from date of birth and calculating age difference. ・ Calculate age from date of birth Calculate age from date of birth and reference date. You can also check the age, counting year, zodiac, the number of days since birth, and the number of days until the next birthday. ・Age Chart from Date of Birth You can see a list of how old a person is from the year they were born. Age before and after birthday is also di