DOY vs MarkDays
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.
MarkDays
This tool helps you remember and count down to significant life events like anniversaries, birthdays, and important schedules. Receive timely reminders so you never miss a special occasion. Track both past and future important dates.
- Mark important life days
- Count down to events
- Track past events
- Timely reminders
- Anniversary tracking
- Birthday reminders
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Markdays is a small, focused tool for remembering the days that matter. Mark a birthday, an anniversary, an exam, a first meeting, or any date you do not want to lose. When the day comes, a timely reminder helps you notice it—not after it has already passed. For example: How many days until a birthday? How many days until the exam? How many days until the next wedding anniversary? How many days has the baby been in the world? How many days have we known each other? Every important day is worth keeping. DAYS REMAINING AND DAYS PASSED See how many days remain until the next marked day, or how many days have already passed. The list is sorted by closeness, so today, upcoming, and past events are easy to tell apart. GREGORIAN AND LUNAR CALENDARS Create an event on the Gregorian calendar or the Chinese lunar calendar. Lunar birthdays and traditional festivals can repeat on the calendar you actually use. In non-Chinese languages you can also choose a second calendar, such as Buddhist, Islamic, Hebrew, or Japanese. REPEAT AND ALERTS Repeat never, daily, weekly, monthly, or yearly. Alerts can fire at the event time, or 5 minutes, 15 minutes, 30 minutes, 1 hour, 2 hours, 1 day, 2 days, or 1 week before. Add a second alert, and snooze for 10 minutes, 30 minutes, or 1 hour. COLOR AND ORDER Give each day a color so the important, the gentle, and the urgent are easy to spot. HOME SCREEN WIDGETS Small, medium, and large widgets can show the nearest event, the next upcoming event, the newest event, or one event you choose. Pin a favorite day to the widget and see the countdown whenever you glance at the Home Screen. APPLE WATCH Check your marked days, remaining or elapsed days, and dates from your wrist. ICLOUD SYNC The main app stores your events with iCloud, so they stay in sync across your devices. Widgets read the same shared data. Change phones or use more than one device—the days you marked are still there. TIME ZONE Follow the system time zone, or pick one yourself, so the day count stays accurate when you travel. The trial version can create 5 events. Upgrade to Professional to add more. We would love for you to try Markdays, and we welcome your feedback. Your support is what keeps us improving.
Screenshots
Verdict
The clearest difference is rating: MarkDays at 5.0 against DOY's 3.0. MarkDays also leads on review sentiment (67% vs 50%) and device support (4 vs 2). DOY's advantage is in-app purchases (none vs 1) and update cadence (every 4 months vs every 70 months). On price, ratings volume, ads and iOS requirement 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
Both are free to download. MarkDays sells 1 one-off in-app purchase. DOY asks for nothing beyond the download.
MarkDays holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 50% of DOY's written reviews are positive against 67% of MarkDays's.
DOY ships an update every 4 months, MarkDays every 70 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | DOY | MarkDays |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | 66.7% of reviews — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 4 months — better | Every 70 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 6 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Hansen | 昊罡 姚 |
Customer experience
DOY
MarkDays
In-app purchases
DOY
No in-app purchases
MarkDays
- Unlock MarkedDays Professional$4.99









