Julianator vs DOY
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 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
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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
Verdict
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
DOY is free to download; Julianator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Julianator | DOY |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (123 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 70.4% of reviews — better | 50.0% of reviews |
| Number of ratings | 123 — better | 2 |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Bright Day Digital LLC | Daniel Hansen |
Customer experience
Julianator
DOY
In-app purchases
Julianator
No in-app purchases
DOY
No in-app purchases







