Comparison

Prometheus vs ExactAge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Prometheus

Visualize your life as a continuously updating clock, down to 10 decimal places. Track unique milestones and explore life statistics. Available on iPhone and Apple Watch with customizable widgets and complications.

Highlights
  • Decimal age clock
  • Life milestone countdowns
  • Detailed life statistics
  • Apple Watch app and complications
  • Home and Lock Screen widgets
  • Live Activities support
Features
Read full description

Your time is precious. See it. Prometheus turns your age into a living clock, updating continuously to 10 decimal places. Count down to numbers you will only pass once, explore your life in weeks and statistics, and keep time visible across iPhone and Apple Watch. YOUR LIFE, LIVE • See your decimal age or a detailed breakdown of years, months, days, hours, minutes, and seconds • Count down to your billionth second, 10,000th day, next trip around the sun, and other once-in-a-lifetime milestones • Get an optional alert at the exact moment a milestone arrives • Explore estimated heartbeats and breaths, lunar cycles, distance traveled through space, and more • See your entire life as one dot for every week ON EVERY SCREEN • Apple Watch app and watch face complications • Home Screen and Lock Screen widgets • Live Activities on the Lock Screen and Dynamic Island • Shareable cards for Stories, Reels, and more SET UP ONCE Enter your birth date and time. Prometheus handles the rest. Your birth data stays on your devices, and no account or sign-in is required. Named after the Titan who gave humanity fire and knowledge, Prometheus is a reminder to see and use your most precious resource: time.

About

ExactAge

Features
Read full description

Ever asked yourself: "How old am I exactly?" or "How many days until my next birthday?" Welcome to ExactAge - the ultimate chronological age finder, date difference calculator, and birthday countdown tracker for iOS and Apple Watch. Designed with precision in mind, ExactAge allows you to calculate age, count elapsed time, and track milestones down to the exact second. Whether you need a baby age tracker, a chronological age calculator for clinical/education profiles, an age difference finder between friends, or a simple days-since counter, ExactAge is the perfect utility. --- Key Features --- Chronological Age Calculator and Tracker Simply select any date of birth and instantly determine exact age in years, months, and days. Perfect for calculating chronological age for school forms, medical profiles, or job applications. Our algorithm runs on robust Gregorian calendar mathematics, meaning it handles leap years and dates in the future seamlessly. Age Difference Calculator Want to find the age gap between you and your partner, friends, or family members? Simply use the compare date feature to act as a date difference calculator. Calculate the exact age difference between two distinct dates instantly. Birthday Countdown and Upcoming Events Track upcoming celebrations with an automated birthday tracker. The app calculates the exact days until your next birthday and reveals the day of the week it will fall on. Never forget a birthday milestone again! Advanced Day Counter and Life Metrics Go beyond simple years. View your lifespan converted into multiple granular units: Total months counter Lifespan day counter (days lived) Total weeks lived since birth Total hours, minutes, and seconds elapsed tracker Saved Profiles Database Save multiple birthdates under custom names. Store dates for family, friends, or clients locally on your device. Instantly load, edit, or delete saved birthdays to compare ages or recall metrics without re-typing. Companion Apple Watch App Get instant age lookup on your wrist! The companion watch app brings the full feature set to Apple Watch, featuring optimized date selector buttons, Digital Crown scrolling, and statistics summaries designed specifically for watch faces. International Localization Support Fully translated with local calendar formatting in 10 languages: English, Espanol, Francais, Deutsch, Hindi, Arabic, Simplified Chinese, Japanese, Portuguese, and Urdu with complete Right-to-Left (RTL) mirroring layout. Modern SwiftUI Customization Customize your view with Light, Dark, or System color schemes. Enjoy smooth micro-animations, custom gradients, built-in system sharing tools to copy/paste stats, and tactile haptic feedback. Secure, private, and offline. No ads, no web trackers, and no external servers. 100% of your data remains on your iPhone or Apple Watch. Download ExactAge now and start counting every precious milestone!

Screenshots

Prometheus4 screens
ExactAge3 screens

Verdict

The call

The clearest difference is device support: ExactAge at 4 against Prometheus's 2. ExactAge also leads on iOS requirement (15.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 7 level
Prometheus versus ExactAge: the parameters behind the verdict, then further details
ParameterPrometheusExactAge
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.615.0 — better
Further details — not scored
Size5 MB2 MB
Age rating4+4+
DeveloperWouter StierhoutAbid Rahim

In-app purchases

None

Prometheus

No in-app purchases

None

ExactAge

No in-app purchases

Questions

Is Prometheus free?
Prometheus is free to download, with no in-app purchases.
Is ExactAge free?
ExactAge is free to download, with no in-app purchases.
Do Prometheus or ExactAge have ads?
Neither Prometheus nor ExactAge shows ads.

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