Difference
Days, weeks + days, years + months + days, or % of the year — switch views on the fly.
What it does
Every date question, answered offline.
CountiGO calculates date differences, working days across 18 countries, countdowns, and exact age — no account, no ads, no internet connection required.
What it does
Date ±
Add or subtract days, weeks, months, or years, with an optional "working days only" mode.
Working days & holidays
Offline holiday data for 18 countries, plus your own weekend filter and custom holidays.
Events & countdowns
Birthdays and deadlines with a live countdown, local reminders, and a shareable countdown card.
Exact age
Precise age, birth weekday, and days until your next birthday.
Home screen widgets
Three configurable Android widgets — countdown, list, and quick actions.
Date math, offline, without ads.
A calculator for every date question, built to work without a network connection.