DateSpan

Track date gaps, date shifts, workdays, and personal reminders without needing the internet.

This app is designed for everyday date planning on the device itself. Compare two dates, switch between inclusive and exclusive counting, and view the result as total days and as a calendar span in years, months, and days.

Use the date shift tool to add or subtract days, weeks, months, or years from a chosen date. When a target month does not have the same day number, the last valid day of that month is used and clearly explained.

The workday tool lets you define your own weekend days and maintain local override dates for off-days or forced workdays. It stays fully offline and does not claim to know regional public holidays.

Personal dates help you save anniversaries, plans, and recurring events. Each item can include a title, date, direction, repeat cycle, tags, and notes. Hidden items can be archived and restored later, while detail views show how far away or how long ago the date is.

Recent calculations keep the latest inputs, rules, and results so you can reload them quickly. A local preferences screen lets you adjust date format, week start, default interval rules, theme, and text size.

Everything stays on the device. The app does not read your system calendar, contacts, or online holiday data.