DOY vs DayNumCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
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.
- 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
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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
Verdict
The clearest difference is review sentiment: DayNumCalc at 100% against DOY's 50%. DayNumCalc also leads on rating (4.8 vs 3.0) and ratings volume (6 vs 2). DOY's advantage is price (Free vs $0.99). On update cadence, ads, in-app purchases and device support 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; DayNumCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
DayNumCalc holds the better App Store score, 4.8 against 3.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 50% of DOY's written reviews are positive against 100% of DayNumCalc's.
DOY ships an update every 4 months, DayNumCalc every 6 months. The most recent releases landed on June 3, 2026 and September 10, 2026 respectively.
| Parameter | DOY | DayNumCalc |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 3.0 (2 ratings) | 4.8 (6 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 6 — better |
| Update frequency | Every 4 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Hansen | Mayra M Martinez |
Customer experience
DOY
DayNumCalc
In-app purchases
DOY
No in-app purchases
DayNumCalc
No in-app purchases
