Onseol: Countdown Widget
Days since, birthday & couple
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Onseol counts the days that matter — no account, no sign-up, no ads.
Your D-Days live on your phone. Onseol has no server and keeps no copy.
• Korean-style D-Days — D-100, D-7, D-DAY, and days-since counted from day 1. 100-day and yearly milestones, automatically.
• Lunar (음력) birthdays & memorials — Onseol finds the solar date for you each year.
• Home & Lock Screen widgets (iOS 16 or later) — automatic, or one D-Day of your choice per widget (iOS 17 or later).
• Reminders at D-7, D-1 and D-DAY, and on day-count milestones — all scheduled on your phone. A small card in the app on milestone days.
• Share a D-Day as a card, with a link that opens it in a friend's Onseol, ready to add.
• Back up your D-Days and their photos to a file you keep, and restore them on a new phone.
ONSEOL PRO — one purchase, forever. Not a subscription.
• Unlimited D-Days and all 16 colors
• Your photo on any D-Day — on its card, and in the Photo widget (iOS 17 or later)
• Three more widget designs: Ring, Photo and Minimal (iOS 17 or later)
• Count it your way — in years, months and days, in weeks, or in hours
• Every milestone with its date, from day 100 to day 10,000
• Ink and Photo share cards
Free: five D-Days, the classic widget in every size, reminders, lunar dates, milestone cards, the Paper share card and backup. Onseol Pro supports Family Sharing.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The ads are gone — all of them. Share a D-Day as a card, with a link that opens it in a friend's Onseol, ready to add. A small card in the app on milestone days. Back up to a file you keep. On iOS 17 or later, each widget can show the D-Day you choose. New in Pro: your photo on any D-Day, three more widget designs (iOS 17 or later), counting in years, months and days, in weeks or in hours, and every milestone with its date. Pro is still one purchase, and now supports Family Sharing.
The developer, Mustafa Salim Erek, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mustafa Salim Erek
- Size
- 29.3 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Onseol Pro $12.99
- Copyright
- © 2026 Erek Studio
