Comparison

Date and Time Calculator vs Julian

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

Head to head
About

Date and Time Calculator

Calculate the exact number of days, hours, and seconds between any two dates. This tool also allows you to find the date before or after a specified period, making it useful for tracking deadlines, events, or financial products.

Highlights
  • Calculate time between any two dates
  • Second-level precision
  • Calculate future dates
  • Calculate past dates
  • Period time calculation
Read full description

Want to know how many days you can receive the Christmas gift? Want to know how many days you will have the college entrance exam?Want to know how many days the 158-day wealth management product expired? This tool helps you to calculate the distance between any time, down to second. It can also calculate the day after that day between any time. This tool is not only for wealth management but also for period time. It can tell you the date before or after a certain period.

About

Julian

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.

Highlights
  • 11 date type conversions
  • Calendar view
  • Copy to clipboard
  • App icon badge display
  • Apple Watch complications
Features
Read full description

Julian makes it simple to find any day of the year, convert dates, and understand your year at a glance on iPhone, iPad, and Apple Watch. Browse the calendar to explore past and future dates, or enter a day number to jump straight to the matching date. Choose the date format you prefer and instantly see the day of the year, year progress, days remaining, week number, and current quarter. Convert between calendar dates, ordinal dates, ISO 8601 dates, ISO week dates, Julian calendar dates, Julian Day Numbers, and Unix timestamps. Add or subtract days, weeks, months, or years, or calculate the exact time between two dates. Julian supports a wide range of astronomical and time counting systems, including CCSDS Julian Date, CNES Julian Date, Dublin Julian Date, Lilian Date, Mars Sol Date, Modified Julian Date, Rata Die, Reduced Julian Date, Truncated Julian Date, and Unix Time. Copy any date value with a tap, or copy and share a complete date summary. Save your favorite formats for fast access whenever you need them. Keep important date information visible with Home Screen and Lock Screen widgets. Customize their layout, colors, and content. Larger widgets can show additional date values and calendar views without opening the app. On Apple Watch, quickly view yesterday, today, and tomorrow, look up any day of the year, and choose complications that match your watch face. Use Siri to retrieve date values and check your year progress. Add Julian actions to Shortcuts to convert dates, perform calculations, copy results, and open detailed date information. Personalize Julian with seven color themes, alternate app icons, and System, Light, or Dark appearance. Set your preferred first day of the week and choose which month begins your first quarter. For an instant glance, enable the optional app icon badge to show the current day of the year. Badge updates are silent and do not create banners or sounds. Notification permission is required. Use the International Fixed Calendar, with 13 months of 28 days, across Julian, widgets, and Apple Watch. Share a personalized image of today's date and year progress.

Screenshots

Date and Time Calculator3 screens
Julian4 screens

Verdict

The call

The clearest difference is in-app purchases: Date and Time Calculator at none against Julian's 3. Date and Time Calculator also leads on review sentiment (81% vs 67%) and iOS requirement (15.0 vs 17.0). Julian's advantage is ads (none vs shown). On price, rating, ratings volume and update cadence 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. Julian sells 3 one-off in-app purchases. Date and Time Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Date and Time Calculator against 4.8 for Julian. Both are backed by a comparable volume of ratings — 9.9K and 4.8K respectively. Written reviews are what separate them: 81% of Date and Time Calculator's written reviews are positive against 67% of Julian's.

UpkeepUpdate frequency

Date and Time Calculator ships an update every 4 weeks, Julian every 2 months. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Date and Time Calculator versus Julian: the parameters behind the verdict, then further details
ParameterDate and Time CalculatorJulian
PriceFreeFree
Rating4.7 (9.9K ratings)4.8 (4.8K ratings) — better
Positive reviews81.0% of reviews — better66.7% of reviews
Number of ratings9.9K — better4.8K
Update frequencyEvery 4 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.0 — better17.0
Further details — not scored
Size18 MB19 MB
Age rating4+4+
Developer山 钟Juan Carlos Perez

Customer experience

Date and Time Calculator

All ratings9,733 ratings
Positive92.7%
Neutral3.4%
Negative3.9%
Written reviews609 reviews
Positive81.0%
Neutral4.8%
Negative14.3%

Julian

All ratings4,699 ratings
Positive95.2%
Neutral2.6%
Negative2.1%
Written reviews84 reviews
Positive66.7%
Neutral16.7%
Negative16.7%

User reviews

Date and Time Calculator

From 9.9K App Store ratings

What we love

  • 💡 Helpful for tracking dates and time
  • 👍 Simple and easy to use
  • 🚀 Accurate calculations
  • 🚀 Useful for various purposes (medication management, work timelines, etc.)

Room to improve

  • 🐛 Ads are intrusive and difficult to close
  • 🐛 Compatibility issues on iPad
  • 🐛 Bugs with date/time calculations
  • 🐛 Language issues with ads

Julian

From 4.8K App Store ratings

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

Bugs and requests

Date and Time Calculator

Reported bugs

3 issues
  • Date/time calculations not always accurate
  • Inability to close ads
  • Compatibility issues on certain devices

Requested features

4 requests
  • Option to calculate business days
  • Ability to save frequently used dates
  • 24-hour time format
  • Improved user interface

Julian

Reported bugs

3 issues
  • Complication not updating correctly on Apple Watch
  • Date displayed incorrectly, one day behind
  • App not functioning properly after updates

Requested features

4 requests
  • Display current date along with Julian date
  • Add countdown/days remaining functionality
  • Display week number
  • Show Julian date on app icon

In-app purchases

None

Date and Time Calculator

No in-app purchases

3 purchases

Julian

One-time3
  • Short Cup$0.99
  • Tall Cup$1.99
  • Grande Cup$2.99

Questions

Is Date and Time Calculator free?
Date and Time Calculator is free to download, with no in-app purchases.
Is Julian free?
Julian is free to download, with in-app purchases available.
Which has better reviews, Date and Time Calculator or Julian?
Julian is rated higher. Date and Time Calculator averages 4.7 out of 5 from 9.9K ratings, while Julian averages 4.8 from 4.8K ratings.
Do Date and Time Calculator or Julian have ads?
Date and Time Calculator shows ads; Julian does not.
Which is updated more often, Date and Time Calculator or Julian?
Date and Time Calculator ships an update every 4 weeks, and Julian every 2 months. Most recently, Date and Time Calculator was updated on November 10, 2026 and Julian on November 6, 2026.

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