NN666Span

ChronoSpan is an offline date utility for everyday planning and personal time tracking.

Use Date Interval to compare two dates with clear boundary rules. You can include or exclude the start and end day, then review the total day count, full weeks, and calendar year-month-day span.

Use Date Adjust to add or subtract days, weeks, months, or years from a chosen date. When a month does not contain the target day, the app uses the last valid day and explains the result.

Use Workday Calculator to count workdays with your own weekly rest days and local exception dates. The app does not use holiday feeds or system calendar data.

Use Personal Dates to store anniversaries, plans, and repeat events locally on the device. You can search, filter, hide, archive, restore, and edit items at any time.

Recent calculations are saved for quick reload, and the app includes settings for date format, week start, default boundary rules, theme, and font size.

ChronoSpan works fully offline and keeps your calculations and personal dates on the device.