If its shows processing time 30 days so its mean the person will get his or her visa in 30days or its not trye ?

​​​​​so this 221g tracker How many percent is is true If this is telling you so many days then do you get a visa in so many days? In my case this is telling 29 And today the show is going to take 30 days So I want to ask The time that the visa is shown in 221g trqcker its corrcrt

It is an approximation. Count working days, not holidays