Best Julian Day Apps & Games

32+ iOS apps & games curated and reviewed

4.6 avg rating
15 free apps & games
Updated July 2026

Every iPhone needs a few good julian day apps and games. We benchmark 32+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Julian Day Apps & Games (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1JulianatorJulianator$0.99 was $1.994.7★ (117)NoNoSep 2026
2Julian - Quick DatesJulian - Quick DatesFree4.8★ (4.6K)NoYesSep 2026
3Julian DateJulian DateFree4.8★ (2.7K)NoSep 2026
4JulianCalJulianCalFreeNoYesAug 2026
5Julian CalendarJulian Calendar$1.994.6★ (60)NoNoSep 2026
6365 Days Calendar365 Days Calendar$1.994.7★ (26)NoNoAug 2026
7Julian ClockJulian Clock$0.994.9★ (15)NoNoAug 2026
8Quick Family TreeQuick Family TreeFree3.9★ (810)YesNoSep 2026

Top Picks for Julian Day

Julianator#1

Julianator by Bright Day Digital LLC

Julian Day of Year Calculator
Editor's Choice
🔧 Utilities
4.7(117 ratings)
$0.99
Julianator screenshot 1
Julianator screenshot 2
Julianator screenshot 3
Julianator screenshot 4
Julianator screenshot 5
Julianator screenshot 6

Easily convert dates between the Gregorian calendar and the Julian Day of Year (ordinal date). This tool is useful for systems that use day-of-year numbering, such as mainframes, military, and food industries. It offers a clean interface, monthly views, and widgets for quick access.

Julian - Quick Dates#2

Julian - Quick Dates by Juan Carlos Perez

Julian dates at a glance
Strong Contender
🔧 Utilities
4.8😊(4.6K ratings)
FreeIn-App Purchases
Julian - Quick Dates screenshot 1
Julian - Quick Dates screenshot 2
Julian - Quick Dates screenshot 3
Julian - Quick Dates screenshot 4
Julian - Quick Dates screenshot 5
Julian - Quick Dates screenshot 6

This app provides a quick and efficient way to view and convert between 11 different types of dates, including standard Julian dates, Mars Sol dates, and Unix time. It features a calendar for easy navigation and allows copying dates to the clipboard. The current date can be displayed on the app icon and Apple Watch complications.

What We Love

  • 🚀 Excellent for work/professional use
  • 👍 Simple and easy to use
  • 👍 Helpful for daily tasks
  • 👍 Convenient complication on Apple Watch

Room to Improve

  • 🐛 Complication issues on Apple Watch (not updating, getting stuck)
  • 🐛 Date discrepancies between app and complication
  • 🐛 App not functioning properly after updates
Julian Date#3

Julian Date by Jevon Charles

Worth Considering
📊 Productivity
4.8😊(2.7K ratings)
FreeIn-App Purchases
Julian Date screenshot 1
Julian Date screenshot 2
Julian Date screenshot 3

Convert between standard calendar dates and Julian dates. Supports 5-digit and full Julian date formats, including time. Also allows conversion from Julian dates back to calendar dates.

What We Love

  • 🚀 Best Julian Date App
  • 👍 Great
  • 👍 Love this APP
  • 👍 Military
  • 👍 wonderful
  • 👍 Great
  • 👍 Nice
  • 👍 Aviation Taught Me Julian
  • 👍 Simple but reliable
  • 👍 Simple an accurate
  • 👍 Works great
  • 👍 Review
  • 👍 Exactly what you need to be effective.
  • 👍 Does
  • 👍 Great Julian Date app!!
  • 👍 Julian Date App
  • 👍 It's simple and it works.
  • 👍 Love this app
  • 👍 Julian app is great for Oracle's JD Edwards EnterpriseOne ERP files
  • 👍 Works great in govt application
  • 👍 Perfect for Julian Date
  • 👍 Works Perfectly As Described
  • 👍 IMDS users, get this app!
  • 👍 Runs as advertised
  • 👍 Nice, comes in handy
  • 👍 5 Stars
  • 👍 Best tool in my check list pouch
  • 👍 Number one
  • 👍 Great app
  • 👍 Awesome

Room to Improve

  • 🤔 Could be improved
  • 🤔 Good but...
  • 🤔 Good app
  • 🤔 Need to make it so you can use on i-watch
  • 🤔 Just an idea
  • 🤔 Trying to sneakily get money
  • 🤔 They charge you
  • 🤔 Not working correctly now.

More Julian Day apps to explore

FAQ about Julian Day

What are the best julian day apps & games for iPhone?
Julianator tops our julian day apps & games ranking as of July 2026, with a 4.7-star average from 117 App Store ratings, and it's priced at $0.99.
Yes — 15 of the top julian day apps & games we rank are free to download, including Julian - Quick Dates and Julian Date.
Julianator has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 32+ julian day apps & games on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
The Julianator app converts dates between the standard Gregorian calendar and the Julian Day of Year, also known as the ordinal date. This is useful for systems that track days sequentially within a year, often used in mainframe computing, military operations, and the food industry.
Key features include bidirectional date conversion (Gregorian to Julian Day of Year and vice versa), a clean interface with date pickers, a monthly view showing both calendar systems, and widgets for both the Home Screen and Lock Screen to display the current day of year. A companion Watch app is also available.

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