when - USA 4+

Counting days and checking dates is surprisingly common in the workplace. However, it can be surprisingly stressful.
This app calculates dates and durations easily and smartly with few operations.

For those rare occasions, we have prepared a simple date calculator. .
We are still trying our best to be ad-free.

Achieve rapid results
-. Use the Calendar PAD, Numeric PAD, Calendar PAD to set the date instead of rotating the date meter.
・The dedicated PAD prevents erroneous input and reduces input errors.
- Show errors quickly.
- Numbers are easy to read with OCR font style.

About operation
・You can change by touching each item.
・To erase PAD, confirm with ENTER, input end, swipe down
・There is no calculation button.

Notes about this app
- before January 1, 1870. Round to January 1, 1870.
・When you press the calendar mark of the day of the week, the calendar PAD will appear.
・If the calculation result exceeds 9999 AD, the input value will be restricted.
• Make the end of the month absurd (for example, 31st).
The "months" displayed in the period calculation are calculated with the "months" up to the same day as the start date of the period. Months that do not have the same day as the start date are treated as "months" up to the last day. (The number of days in the month changes)
Example) January 30, 2020 to March October 2020 =
January 30th to February 29th → 1 month,
February 29th to March 10th → 10th,
March 3, 2020 to May 5, 2020 =
March 3rd to May 5th → 2 months
From May. 3rd to May 5th → 2 days
*Excludes end date.

About app settings
Press the gear on the topscreen or go to [Settings] > [When] to open settings screen.

About icons
・Icons can be changed on iOS 10.3 or higher
・If you switch the dark theme ON/OFF in the settings, the icon's color will change too.