BirthYay: Age & Birthday

Ever been put on the spot, "how old is she exactly?", and had to count on your fingers? Or realized a friend's birthday was yesterday? BirthYay fixes both.

BirthYay is a beautifully simple age calculator and birthday reminder in one. Get anyone's exact age in a tap, measure the days between any two dates, and keep a live countdown to every birthday that matters — so you're never caught off guard again.

★ EXACT AGE, INSTANTLY
• Any age in precise years, months and days
• Perfect for a baby's exact age, work anniversaries, tenure and milestones
• No more mental math or counting on a calendar

★ DAYS BETWEEN ANY TWO DATES
• Measure the time between any start and end date, with total days and weeks
• Great for deadlines, due dates, countdowns and planning

★ NEVER MISS A BIRTHDAY AGAIN
• Save the birthdays you can't afford to forget
• A live countdown shows exactly who's next and how many days away
• Instantly see the age each person is turning

★ MADE TO ENJOY — warm, playful design with confetti moments 🎉, light & dark themes, and saved calculations you can revisit anytime.

★ PRIVATE & OFFLINE — works fully offline, no account needed, your dates stay on your device.

Available in English, French, Spanish, Portuguese and Indonesian.

Whether you're a parent tracking your little one's growth, an HR pro counting tenure, a student, or someone who just wants to celebrate the people they love on time — BirthYay turns every date into a reason to celebrate.

Download BirthYay today. 🎂