Not just a calendar. Transform your time into a masterpiece.
Chrono Rainbow beautifully visualizes both Western and Japanese calendars, offering a unique way to connect with your time.
Reflect on the past, embrace the present, and look toward the future. This calendar app lets you experience the joy of progress through a vibrant rainbow.

Key Features
- Easily register anniversaries and birthdays
Never forget your special days and cherish the memories anytime. Register events to add a touch of color to your most meaningful moments.
- Effortlessly view Western and Japanese calendars
From Meiji to Reiwa eras, Chrono Rainbow bridges the past and the future by displaying the alignment of Western and Japanese calendars in a clear and accessible way.
- Discover the rhythm of the seasons
Experience the beauty of traditional Japanese culture with seasonal markers like solstices, equinoxes, and more. Infuse your daily life with the charm of Japanese tradition.
- Visualize your yearly progress with a rainbow
See your progress throughout the year as a colorful rainbow bar. Each day adds a new stroke to your unique masterpiece, making time feel both productive and beautiful.
- Customize your calendar with themes
Personalize your calendar with a variety of free color themes. For an even richer experience, unlock exclusive Japanese-inspired colors with the “Chrono Colors Plan.”

Why Choose the Chrono Colors Plan?
- Explore the art of Japanese colors
Add depth to your calendar with traditional Japanese hues like Benibana (Pink), Ume (Plum), Uguisu (Green), and Aoi (Violet).
- Elevate your design
Transform your calendar into a personal work of art with an array of exclusive premium colors, tailored to reflect your individuality.
- Enjoy unlimited event registrations
Capture every special day and weave them into your unique story.
- Customize your experience with selectable icons
Choose your favorite icon to personalize your app and make it truly yours.

Download Chrono Rainbow and redefine your time!
Step into a world where your days are painted with vibrant hues.
Chrono Rainbow brings together the past, present, and future, creating a calendar that turns every day into something extraordinary.

A Message from Us
Thank you for taking the time to learn about Chrono Rainbow.
This app is more than just a calendar—it’s a tool to make your days richer, more meaningful, and beautifully vibrant.
Time is a limited resource, but we believe it should not simply pass unnoticed. With Chrono Rainbow, we aim to help you see your time as a series of precious and shining moments.
We’re committed to continuously evolving the app by adding new ideas and features that make your days even more colorful.
Join us in creating your personal story with Chrono Rainbow. Thank you for your support, and we look forward to being part of your journey.

End-User License Agreement
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Chrono Rainbow is an independent application and is not endorsed, sponsored, or approved by Apple Inc.
Product names, service names, and company names mentioned in this app are trademarks or registered trademarks of their respective companies.