ChronoSpan

ChronoSpan is a fully offline date toolkit for everyday planning and personal date tracking.

Use it to compare two dates with clear boundary options, shift a date forward or backward by days, weeks, months, or years, and handle month-end rollovers with a clear explanation.

Build workday counts with your own rest-day rules, custom off dates, and custom work dates. The app does not read the system calendar and does not rely on online holiday data.

Keep personal dates for anniversaries, plans, or recurring events. Each item can include a title, date, direction, repeat cycle, tag, and note. You can archive items, restore them later, and review how long remains or how much time has passed.

Recent calculations stay on the device so you can reopen previous inputs and results quickly. Preferences let you change date format, default boundary behavior, theme, text size, and history storage.

Everything runs locally for fast, private use.