Comparison

Julianator vs DOY

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
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

DOY

This app helps you track important upcoming events by counting down the days. It also provides the Day Of Year and sunrise/sunset times for each event based on your location.

Highlights
  • Countdown to user-defined events
  • Displays Day Of Year for events
  • Provides sunrise and sunset times
  • Location-based sunrise/sunset data
  • Inspired by military 'short timer' tapes
Features
Read full description

They say don't count the days, make the days count. Why not do both? 40 years ago, when I was serving in the U.S. Army Field Artillery, the PX sold tapes with tear-away numbers, allowing 'short timers' to countdown the days as they neared the end of their active duty service. Those tapes are the inspiration for DOY, which tracks the number of days until a user configurable set of events. As a bonus, for each upcoming event, DOY also provides the Day Of Year, and sunrise and sunset times based on your current longitude and latitude.

Screenshots

Julianator4 screens
DOY4 screens

Verdict

The call

The clearest difference is price: DOY at Free against Julianator's $0.99. DOY also leads on iOS requirement (15.0 vs 17.4). Julianator's advantage is rating (4.7 vs 3.0) and ratings volume (123 vs 2). On update cadence, ads, in-app purchases and monetization model 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

DOY is free to download; Julianator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Julianator holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Julianator has 123 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 70% of Julianator's written reviews are positive against 50% of DOY's.

UpkeepUpdate frequency

Julianator ships an update every 3 months, DOY every 4 months. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

Scorecard5 real differences · 5 level
Julianator versus DOY: the parameters behind the verdict, then further details
ParameterJulianatorDOY
Price$0.99Free — better
Rating4.7 (123 ratings) — better3.0 (2 ratings)
Positive reviews70.4% of reviews — better50.0% of reviews
Number of ratings123 — better2
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS17.415.0 — better
Further details — not scored
Size4 MB6 MB
Age rating4+4+
DeveloperBright Day Digital LLCDaniel Hansen

Customer experience

Julianator

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

DOY

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Julianator

No in-app purchases

None

DOY

No in-app purchases

Questions

Is Julianator free?
Julianator costs $0.99, with no in-app purchases.
Is DOY free?
DOY is free to download, with no in-app purchases.
Which has better reviews, Julianator or DOY?
Julianator is rated higher. Julianator averages 4.7 out of 5 from 123 ratings, while DOY averages 3.0 from 2 ratings.
Do Julianator or DOY have ads?
Neither Julianator nor DOY shows ads.
Which is updated more often, Julianator or DOY?
Julianator ships an update every 3 months, and DOY every 4 months. Most recently, Julianator was updated on October 23, 2026 and DOY on October 20, 2026.

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