# Chrono Rainbow — Japanese & Western Calendars

> A visually rich calendar app combining Western and Japanese calendars with progress visualization. (iPhone/iPad app by Toshiaki Nakamura.)

- Source: https://appshunter.io/ios/app/chrono-rainbow/id6739449092 (this page in markdown: same URL + `.md`)
- Developer: [Toshiaki Nakamura](https://appshunter.io/developer/822485897)
- Category: Reference, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.5 · 86 MB
- Languages: American English, Japanese
- Released: 2025-01-07
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/chrono-rainbow/id6739449092/reviews.md

## What is Chrono Rainbow?

See today, the seasons, and your progress through the year—all in one colorful calendar.

Chrono Rainbow brings Western and Japanese calendars, Rokuyou, seasonal markers, and your progress through the year into one beautifully designed experience.

Choose from nine distinctive display themes and enjoy each day in a style that feels like your own.

Key Features

- See today and your progress through the year
Discover where today falls within the year through day counts and a colorful rainbow progress view. Each passing day adds another color to the year, helping you notice the progress you have already made.

- Explore Western years and Japanese eras
Browse the relationship between Western years and Japanese eras, from Meiji through Reiwa. Move between different ways of looking at the past and the years ahead.

- Explore Rokuyou and Japan's 24 solar terms
See traditional calendar markers such as Rokuyou, solstices, equinoxes, and the 24 solar terms alongside your everyday calendar.

- Keep birthdays and anniversaries together
Register birthdays, anniversaries, and other meaningful dates so they are easy to revisit whenever you open the app.

- Choose from nine display themes
Explore Simple, Pop, Fantasy, Japanese, Natural, Underwater, Starry, Retro, and Cyber. Each theme brings its own backgrounds, colors, typography, cards, and visual details to your calendar.

- Enjoy seasonal scenery and gentle motion
Japanese and Natural themes change with the seasons. Pop, Starry, and Underwater add subtle ambient details such as drifting clouds, rainbows, shooting stars, bubbles, and fish. Motion respects the system Reduce Motion setting.

- Customize your theme color
With the Simple theme, choose from a selection of free accent colors. The Chrono Colors Plan unlocks additional theme colors, including an extensive collection inspired by traditional Japanese hues.

More with the Chrono Colors Plan

- Unlock additional theme colors, including colors inspired by traditional Japanese hues
- Remove the event registration limit
- Choose from available alternate app icons for your Home Screen

See each day through calendars, seasons, and the progress of your year.
Chrono Rainbow adds a gentle touch of color to the time that matters to you.

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.

## Key features

- Western and Japanese calendar display
- Anniversary and birthday registration
- Japanese seasonal markers
- Yearly progress visualization
- Customizable themes
- Traditional Japanese colors

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Chrono Colors Plan 1 year | $2.99 | per year |
| Chrono Colors Plan 1 month | $0.29 | per month |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/chrono-rainbow/id6739449092/reviews.md

### 5/5 — キャラクターがかわいい🩷

*2026-07-29*

タイトルの通り、キャラクターのこぱんがかわいい😍アイコンもかえれるし、3月とかの古い言い方もしれるから面白い！一年の虹🌈って言うのもあるし、自分の誕生日も設定できる！良い点がいっぱいあるから、星5にしました。

### 5/5 — まぁスゴイネ〜

*2025-07-21*

いいんじゃない👍

**Developer response:** レビューありがとうございます！
たくさんの星をいただいて、パンダも大喜びです！！
Chrono Rainbowで大切な時間を彩っていただけると嬉しいです。
これからもChrono Rainbowをよろしくお願いします。

## Frequently asked questions about Chrono Rainbow

### What is Chrono Rainbow?

Chrono Rainbow is a calendar application that beautifully visualizes both Western and Japanese calendars. It allows users to register special dates, discover seasonal rhythms, and visualize their yearly progress through a unique rainbow interface.

### Does Chrono Rainbow have ads?

No, Chrono Rainbow does not contain advertisements, offering an uninterrupted user experience.

### What are the subscription options for Chrono Rainbow?

Chrono Rainbow offers the 'Chrono Colors Plan' with monthly ($0.29) and yearly ($2.99) subscription options. These plans unlock exclusive Japanese-inspired colors and unlimited event registrations.

### Can I register unlimited events in Chrono Rainbow?

The free version of Chrono Rainbow allows event registration, but the 'Chrono Colors Plan' subscription provides unlimited event registrations for a richer experience.

### What traditional Japanese elements are included in Chrono Rainbow?

Chrono Rainbow includes traditional Japanese seasonal markers such as solstices and equinoxes. Subscribers can also access exclusive traditional Japanese color palettes.

### What devices is Chrono Rainbow available on?

Chrono Rainbow is available on iPhone and iPad devices.

### How often is Chrono Rainbow updated?

The latest version of Chrono Rainbow is 1.7.1, last updated on February 2, 2026. The developer is committed to continuous evolution with new ideas and features.

### What is the age rating for Chrono Rainbow?

Chrono Rainbow has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 1.8.0 — 2026-08-16

ChronoRainbow now includes nine display themes: Simple, Pop, Fantasy, Japanese, Natural, Underwater, Starry, Retro, and Cyber.

Japanese and Natural themes change with the seasons, while Pop, Starry, and Underwater add gentle ambient motion. These effects respect the Reduce Motion accessibility setting.

Chrono Rainbow will continue to evolve little by little, bringing gentle color and harmony to your time.

If you enjoy Chrono Rainbow, leaving a star rating would mean a lot and greatly support its development.
We will keep creating updates that give you more freedom to enjoy your time in every color of the rainbow.

### 1.7.1 — 2026-02-02

We made small refinements to improve the overall experience.
To help you find a meaningful day more naturally, within the gentle flow of time.

If you enjoy using Chrono Rainbow, even a star would mean a lot to us.
We’ll keep updating Chrono Rainbow to make your rainbow time more free and expressive.
Thank you for your continued support.

### 1.7.0 — 2026-01-15

Events are now even easier and more comfortable to use.
We’ve added date filters to help you find events more intuitively.
You can now choose from Today, This Week, This Month, or narrow things down with
Select Month & Day…, Select Date…, or simply View All.

Find the moments that matter most within the flow of time.
Chrono Rainbow will continue to gently evolve, helping your days fall into beautiful balance.

If you enjoy using Chrono Rainbow, even a star would mean a lot to us.
We’ll keep updating Chrono Rainbow to make your rainbow time more free and expressive.
Thank you for your continued support.

### 1.6.0 — 2026-01-02

Happy New Year from Chrono Rainbow!
To welcome the Year of the Horse, Chrono Rainbow now supports the 2026 zodiac icon.
We’ve also added support for Liquid Glass in iOS 26, so your time now shines with even more depth and beauty.
May this year be filled with colors that gently light up your everyday moments.
Let Chrono Rainbow continue to add a soft glow to your most precious time.

If you like Chrono Rainbow, please give us a star to encourage our development.
We will keep updating Chrono Rainbow to make the rainbow time more free.
Thank you for your support!

### 1.5.0 — 2025-07-14

Chrono Rainbow has evolved to make your precious time even more beautifully vibrant!
This update enhances both visual beauty and functionality — bringing your daily experience to the next level.
- New premium theme colors added
We’ve expanded the Chrono Colors Plan with 18 new premium colors inspired by the seasons and traditional Japanese hues.
Enjoy vivid and expressive shades like Shu (Vermilion), Karakurenai (Deep Red), Shion (Aster Purple), and Mizu-Asagi (Light Blue-Green) — colors that transform your time into a living work of art.

- Smarter, more flexible calendar
Switch between yearly, monthly, and weekly views to suit your needs.
You can also set your preferred start day of the week — tailor your calendar to match your lifestyle.

- Optimized for iPad
Now fully supports larger screens with a responsive layout.
You can view your summary and calendar side by side, making time management smoother and more intuitive than ever.

Make your time more personal, more free.
Chrono Rainbow helps turn your everyday into art.

If you like Chrono Rainbow, please give us a star to encourage our development.
We will keep updating Chrono Rainbow to make the rainbow time more free.
Thank you for your support!

## Apps similar to Chrono Rainbow

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Koyomi \| Japanese year checker](https://appshunter.io/ios/app/koyomi-japanese-year-checker/id1620479221) | — | Free | Reference |
| [日本姓氏語源辞典](https://appshunter.io/ios/app/id1471109324) | — | Free | Reference |

## More apps by Toshiaki Nakamura

- [Astrowanderer](https://appshunter.io/ios/app/astrowanderer/id888637098)
- [Children's Scales](https://appshunter.io/ios/app/childrens-scales/id908059265)
- [Catch the Panda AR](https://appshunter.io/ios/app/catch-the-panda-ar/id992846109)
- [Ukiyo-e clock](https://appshunter.io/ios/app/ukiyo-e-clock/id1053381570)
- [Good Night, TV! Put your kids to bed with Papandakko.](https://appshunter.io/ios/app/good-night-tv-put-your-kids-to-bed-with-papandakko/id1061461187)
- [PapandakkoSticker](https://appshunter.io/ios/app/papandakkosticker/id1153458977)

All apps by Toshiaki Nakamura: https://appshunter.io/developer/822485897

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*