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Screenshots

  • JulianCal screenshot 1
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About JulianCal

JulianCal is the ultimate app for calculating and displaying the Julian Day of the year, an essential tool for production, logistics, and batch tracking. KEY FEATURES Real-time Julian Day • Display Julian Day of the year (1-365/366) • Automatic updates every minute • Leap year indication Customizable Batch Code • Generate automatic batch codes with custom prefix • 2 or 3-digit format for Julian Day • One-tap copy to clipboard Julian Day → Date Converter • Convert instantly from Julian Day to calendar date • Support for years 1900-2100 • Detailed info: day of week, week number, quarter Interactive Calendar • View calendar with Julian Day for each date • Select any date to see details • Switch between monthly and weekly view Year Progress • Visualize percentage of year passed • Animated progress bar • Days remaining until year end Statistics & Information • Week number of the year • Current quarter (Q1-Q4) • Days remaining in current year • Julian Day Number (since January 1, 4713 BC) USE CASES Production & Manufacturing: Product tracking and batch codes Logistics: Shipment organization and expiry dates Agriculture: Harvest planning and crop cycles Project Management: Working days and deadlines Science & Research: Astronomical calculations FEATURES • Modern and intuitive interface • Automatic light and dark theme • Works offline • Quick copy to clipboard • Full Italian and English support • Lightweight and fast • Free app with discreet ads PERFECT FOR • Production managers • Logistics operators • Project managers • Farmers and gardeners • Researchers and students • Anyone needing quick Julian Day calculations Download JulianCal now and simplify your work with Julian Days!

What’s new

Version 1.5.0 · Updated August 5, 2026

What's new in 1.5.0: • Home Screen widgets! Add the Julian Day, the date and the batch code right on your Home Screen, in several resizable sizes. • New week-number widget. • App icon badge: see the Julian day or the week number at a glance (enable it in Settings). • The number updates automatically at midnight, in your phone's time zone. • Improved widget design: large, centered number. • Various fixes and stability improvements.

App privacy

The developer, Matteo Masin, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to JulianCal

Looking for apps like JulianCal? Here are 6 similar apps on the App Store. The highest rated is AmhSkyBrief (5.0/5), and 3 of the 6 are free to download.

JulianCal vs. alternatives
App Rating Price Last updated Compare
JulianCal – Free August 5, 2026
Julian - Quick Dates 4.8 / 5 (4,756) Free Oct 3, 2026 Compare
Julianator 4.7 / 5 (123) 0.99 USD Sep 18, 2025 Compare
AmhSkyBrief 5.0 / 5 (1) Free Mar 9, 2026 Compare
Datum - Calendar – 1.99 USD Oct 12, 2026 Compare
Calendar : 4500 BC to 4500 AD 5.0 / 5 (2) 1.99 USD Aug 15, 2025 Compare
MSU-E Experts Directory – Free Feb 24, 2026 Compare

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