DateSmithy

Fast offline date calculations: days between dates, add/subtract natural days or workdays. Custom workweek, holidays support. Privacy-first.

DateSmithy is your go-to date calculator for quick and accurate date math — completely offline and privacy-focused.

KEY FEATURES

• Days Between Calculator Calculate exact days between any two dates with approximate weeks and months. Perfect for tracking project durations, age calculations, or event countdowns.

• Date Add/Subtract Add or subtract days from any date using either:

• Natural days: straightforward calendar arithmetic
• Workdays: intelligent business day calculations respecting your workweek

• Custom Workweek & Exceptions

• Choose 5-day or 6-day workweek
• Add extra off days (holidays, vacation)
• Add make-up work days (schedule adjustments)
• Efficient algorithm handles large date ranges

• Calculation History Automatically saves your recent calculations. Tap any history item to instantly restore and reuse it.

• Quick Presets Fast-track common calculations with built-in presets: 7, 30, 90, 180, and 365 days.

• Privacy First 100% offline. Zero tracking. All data stays on your device. No account required.

PERFECT FOR

• Project planning and timeline estimation • Payroll and workday calculations • Contract date tracking • Event planning and countdowns • Personal scheduling • Business day calculations across holidays

SIMPLE & INTUITIVE

Clean, native iOS interface with Material Design 3 styling. Date pickers, segmented controls, and clear result displays make complex date math feel effortless.

WHY DATESMITHY?

Unlike online calculators or bloated apps, DateSmithy is:

• Lightning fast for any date range
• Works offline anytime, anywhere
• Respects your privacy completely
• Lightweight and battery-friendly
• Free of ads and subscriptions

Download DateSmithy today and make date calculations simple.