AgeSphere
Real-time age calculator
Watch your age update every 100 milliseconds. Exact years, months, days, hours, minutes, and seconds — with leap years and Feb 29 handled correctly.
No ads · No subscriptions · No tracking
The age calculator that counts every second of your life
AgeSphere tracks your age with millisecond precision, counts down to every birthday, converts your pet's age with vet-approved formulas, and reveals 20+ statistics about your time alive — all offline, with zero ads.
$4.49 one-time on the App Store · iOS 15.1+ and Android · By indie developer Mobin Akhter
What AgeSphere looks like on your phone
Three more screens from the app: the life statistics grid, the record of your birth date, and the side-by-side comparison tool.
"How old am I, exactly?" deserves a better answer than a number
Most age calculators give you a static number in years and stop there. Birthdays sneak up on you, pet ages get mangled by the outdated "multiply by 7" rule, and nobody can tell you how many hours you've actually been alive.
The problem
- Basic calculators round your age to years — no days, hours, or seconds
- Leap years and February 29 birthdays trip up naive date math
- Family birthdays get forgotten without a countdown in view
- The "dog years × 7" myth misjudges your pet's real life stage
- Many free apps are stuffed with ads and quietly track you
The AgeSphere answer
- Real-time age that refreshes every 100 milliseconds, down to the second
- Date math that handles leap years and Feb 29 edge cases flawlessly
- Birthday countdowns in days, hours, and minutes for the people you love
- Vet-approved pet formulas — including breed-specific math for 126 dog breeds
- Offline-first, no ads ever, no tracking, one-time purchase
Everything AgeSphere calculates for you
Every feature below ships in the app today — from precision date math to planetary birthdays computed with NASA orbital data.
Birthday countdown
See exactly how many days, hours, and minutes until each birthday. Track up to 3 profiles free; premium unlocks unlimited profiles and groups.
20+ life statistics
Hours alive, heartbeats, breaths, steps walked, words spoken, blood pumped, cells regenerated, meals eaten — scientifically verified and fully customizable.
Pet age calculator
10 animals with vet-approved formulas: dogs (126 breeds), cats, rabbits, hamsters, birds, guinea pigs, horses, fish, turtles, and ferrets — with life stage indicators.
Planetary ages
How old are you on Mars? Get your age on all 8 planets from NASA orbital data, your next planetary birthday, and the moon phase at your birth.
Famous birthdays & history
Discover who shares your birthday among 403 verified celebrities, plus 503 historical events from your birth date — IMDB and Wikipedia verified.
Milestones & achievements
Automatic tracking for 100, 1,000, 10,000, and 20,000 days lived — plus 1 and 2 billion seconds — with progress bars, shareable cards, and confetti.
Age comparison tool
Compare two people: exact age gap in days, hours, and minutes, percentage older, birthday proximity, and zodiac detection.
Private by design
Offline-first — it works without internet. No ads ever, no subscriptions, no tracking. Dark mode, 60fps animations, and haptic feedback on iOS.
100 msage refresh rate
126dog breeds supported
403verified famous birthdays
8planets for age conversion
How AgeSphere fits into your life
A precise age calculator turns out to be surprisingly useful — and surprisingly fun.
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Never miss a birthday again
Add the people who matter and watch live countdowns in days, hours, and minutes. Milestone alerts mean the big ones — a parent's 60th, a child's 10th — never catch you off guard.
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Understand your pet's real life stage
Breed-specific dog math and formulas for 9 other animals tell you whether your companion is a puppy, adult, or senior — so age-appropriate care decisions get easier.
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Celebrate milestones you'd otherwise miss
Your 10,000th day and your billionth second happen exactly once. AgeSphere tracks them with progress bars and gives you shareable, watermark-free cards when they arrive.
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Make time tangible for curious kids
Planetary ages, moon phases at birth, heartbeats counted, and historical events from a birth date turn abstract time into something a child can see tick.
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Settle "who's older?" for good
The comparison tool computes the exact gap between two people down to minutes — plus percentage older and zodiac signs — for friendly disputes everywhere.
Frequently asked questions
Straight answers about accuracy, pricing, and privacy.
AgeSphere updates your age every 100 milliseconds and calculates it down to the exact second, minute, hour, and day. It handles leap years and February 29 birthdays correctly.
No. AgeSphere has no ads, no subscriptions, and no tracking. Premium features are unlocked with a single one-time purchase — the app is listed at $4.49 on the App Store.
Yes. AgeSphere is offline-first and works without an internet connection. Combined with its no-tracking policy, your birthday data stays on your device.
Ten animal types: dogs (with 126 breed-specific calculations), cats, rabbits, hamsters, birds, guinea pigs, horses, fish, turtles, and ferrets. Dog ages use the modern logarithmic formula rather than the outdated multiply-by-seven rule, with life stage indicators such as Puppy, Adult, and Senior.
AgeSphere tracks up to 3 birthday profiles on the standard tier. The one-time premium unlock adds unlimited birthday profiles, profile groups (Family, Friends, Pets), unlimited pet profiles, all 20+ life statistics, a relationship duration tracker, custom themes, and PDF reports.
AgeSphere calculates your age on all 8 planets using NASA orbital data, counts down to your next planetary birthday, and shows the astronomically accurate moon phase at your birth. Its database also includes 403 verified celebrities and 503 historical events tied to your birth date.
AgeSphere is a universal iOS app requiring iOS 15.1 or later, and it is also available on Google Play for Android. It supports dark mode and haptic feedback on iOS.
Your billionth second is coming. Know when.
One-time purchase. No ads, no subscriptions, no tracking — just millisecond-precision age calculation, birthday countdowns, pet ages, and planetary birthdays.