Comparison

Julianator vs DayNumCalc

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

Head to head
About

Julianator

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.

Highlights
  • Gregorian to Julian Day of Year conversion
  • Julian Day of Year to Gregorian conversion
  • Monthly calendar view
  • Home Screen widgets
  • Lock Screen widgets
  • Watch app with complications
Features
Currently charting
Read full description

This app converts a date between Julian Day of Year and Gregorian. For example, September 11, 2022 converts to 2022-254 and 2022-254 converts to September 11, 2022. This app will convert both directions. Julian Date for this app refers to the day-of-year number (more properly, the ordinal date) in the Gregorian calendar, often used in mainframe computer systems, the military, and the food industry. (Note: this app does not used the term Julian Date to refer to the astronomy definition which is calculated from 4713 BC) Features a simple clean interface with pickers for the dates. The app also features a monthly view allowing a quick view of both Gregorian and Julian days for the entire month. Widgets are available for both the Home Screen and the Lock Screen to display the current day of year. A Watch app is available that includes a date converter and complications to display the current day of year. Note: The app's icon does not change to reflect the current day. Privacy Policy: https://julianator.brightdaydigital.com/privacy Terms of Service: https://julianator.brightdaydigital.com/terms

About

DayNumCalc

This utility app provides quick access to date calculations, including finding the day number for any date, determining a date from a day number, calculating the difference between two dates, and checking the day of the week. It also offers widgets for convenient access on your home and lock screens.

Highlights
  • Calculate day number from date
  • Determine date from day number
  • Calculate days between two dates
  • Add/subtract days from a date
  • Check day of the week
  • Home screen widgets
  • Today View widgets
  • Lock screen widgets
Read full description

DayNumCalc gives easy access to basic date calculations: - The current date/day number information is immediately available. Examples: day 1 = 1 January; day 365 = 31 December (non-leap year) or 30 December (leap year) - Date/day number calculations: get the day number from a chosen date, and a date from a paired year/day number - Calculate the number of days between two dates - Determine a date after adding or subtracting a number of days fro a chosen date - Check the day of the week for a date of your choice Widgets for the Home Screen, the Today View, and the Lock Screen are available for ease of use.

Screenshots

Julianator4 screens
DayNumCalc4 screens

Verdict

The call

The clearest difference is monetization model: Julianator at free against DayNumCalc's paid. Julianator also leads on ratings volume (124 vs 6) and chart position (#195 vs unranked). DayNumCalc's advantage is review sentiment (100% vs 70%) and iOS requirement (15.5 vs 17.4). On price, rating, 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

Julianator costs $0.99 and DayNumCalc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Julianator against 4.8 for DayNumCalc. That said, the two scores are not equally well evidenced: Julianator has 124 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 70% of Julianator's written reviews are positive against 100% of DayNumCalc's.

UpkeepUpdate frequency

Julianator ships an update every 3 months, DayNumCalc every 6 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 5 level
Julianator versus DayNumCalc: the parameters behind the verdict, then further details
ParameterJulianatorDayNumCalc
Price$0.99$0.99
Rating4.7 (124 ratings)4.8 (6 ratings) — better
Positive reviews70.4% of reviews100.0% of reviews — better
Number of ratings124 — better6
Update frequencyEvery 3 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank#195 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.415.5 — better
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperBright Day Digital LLCMayra M Martinez

Customer experience

Julianator

All ratings117 ratings
Positive94.0%
Neutral0.0%
Negative6.0%
Written reviews27 reviews
Positive70.4%
Neutral11.1%
Negative18.5%

DayNumCalc

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Julianator

No in-app purchases

None

DayNumCalc

No in-app purchases

Questions

Is Julianator free?
Julianator costs $0.99, with no in-app purchases.
Is DayNumCalc free?
DayNumCalc costs $0.99, with no in-app purchases.
Which has better reviews, Julianator or DayNumCalc?
DayNumCalc is rated higher. Julianator averages 4.7 out of 5 from 124 ratings, while DayNumCalc averages 4.8 from 6 ratings.
Do Julianator or DayNumCalc have ads?
Neither Julianator nor DayNumCalc shows ads.
Which is updated more often, Julianator or DayNumCalc?
Julianator ships an update every 3 months, and DayNumCalc every 6 months. Most recently, Julianator was updated on October 29, 2026 and DayNumCalc on October 24, 2026.

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