Anniversary Tracker- Koi Diary
Relationship Day Counter
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Make every special day with your loved one even more meaningful. Make every special day with your loved one even more meaningful.
Koi Diary is a simple and cute relationship day counter app that helps you track anniversaries, celebrate milestones, and save precious memories — for couples and fandom moments alike.
Count how many days you’ve been together, check how many days remain until your next anniversary, or record important dates like the day you fell in love, became a fan, or your favorite artist’s debut day.
Every day becomes a moment worth remembering.
How many days have you been together?
How many days until your next special milestone?
With Koi Diary, you’ll never miss what matters most.
【Main Features】
■ Anniversary Counter
・Count days since you started dating or days until your next anniversary
・Switch between days / weeks / months / years with a single tap
・Customize backgrounds and icons using built-in wallpapers or your own photos
・Change text colors and fonts to create a screen that feels truly yours
■ Special Milestones
・Automatically highlights special dates such as 100 days, 1,000 days, repeating numbers, monthly and yearly anniversaries
・Easily check how many days remain until each milestone
■ Personal Diary
・Save memories from dates, daily life, or fan events
・Each entry shows how many days have passed since your chosen anniversary
・Add photos and notes to keep your memories like a private album
■ Secure & Private
・Protect your diary with a 4-digit passcode
・Your personal memories stay safe and private
Perfect for you if:
・You enjoy counting relationship days
・You don’t want to forget important anniversaries
・You want to keep memories in a cute and simple way
・You’re looking for a romantic but easy-to-use diary app
Turn your everyday moments into shining memories with Koi Diary
Terms of Use
https://koisurudiary.com/terms
Privacy Policy
https://koisurudiary.com/privacy
Contact
https://koisurudiary.com/contact
EULA
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added iCloud Backup, allowing Premium users to securely back up and restore their precious memories.
The developer, Kobayashi Ryotaro, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kobayashi Ryotaro
- Size
- 85.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 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 and Japanese
- Age Rating
13+
- 13+
- Contains
Advertising
Messaging and Chat
User-Generated Content
- In-App Purchases
Yes
- Premium Plan (Lifetime) $19.99
- Premium Plan (1 Month) $3.99
- Copyright
- © 2025 Kobayashi Ryotaro