Exact age in years, months and days — a plain date utility, no login needed.
A straightforward calendar calculation — years, months and days between two dates — kept free of the login gate the ephemeris-based tools use, since it needs no astronomical data.
By calendar difference: complete years first, then complete months, then the remaining days — the ordinary way age is stated. The total number of days lived and the countdown to the next birthday are shown alongside.
Yes. The day count follows the real calendar, including leap days, so the total is exact rather than a 365-day approximation.
No. It is a plain calendar calculation with no astronomical data behind it, so it stays outside the login gate the ephemeris-based tools use.