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Best Julian Calendar Apps

249+ iOS apps curated and reviewed

4.6 avg rating
16 free apps
Updated October 2026

Out of 249+ julian calendar apps on iOS, 16 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Julian Calendar Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Julian - Quick DatesJulian - Quick DatesFree4.8★ (4.7K)NoYesOct 2026
2Julian DateJulian DateFree4.8★ (2.7K)—NoOct 2026
3Julian CalendarJulian Calendar$1.994.6★ (60)NoNoOct 2026
4JulianDatrJulianDatrFree5.0★ (1)NoNoMay 2026
5365 Days Calendar365 Days Calendar$1.994.7★ (26)NoNoAug 2026
6Orthodox CalendarOrthodox CalendarFree—NoNoSep 2026
7Timeline CalendarTimeline CalendarFree—NoYesSep 2026
8Countdown: Memento CalendarCountdown: Memento CalendarFree—NoYesOct 2026

Top Picks for Julian Calendar

Julian - Quick Dates#1

Julian - Quick Dates by Juan Carlos Perez

Julian dates at a glance
Editor's Choice
🔧 Utilities
4.8😊(4.7K 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#2

Julian Date by Jevon Charles

Strong Contender
📊 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 Calendar apps to explore

FAQ about Julian Calendar

What are the best julian calendar apps for iPhone?
Julian - Quick Dates tops our julian calendar apps ranking as of October 2026, with a 4.8-star average from 4.7K App Store ratings, and it's free to download.
Yes — 16 of the top julian calendar apps we rank are free to download, including Julian - Quick Dates and Julian Date.
Julian - Quick Dates has no ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 249+ julian calendar apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.