# Tsukibyobu: Moon Screen — A folding screen in your hand

> Interactive Japanese folding screen with dynamic moon phases and seasonal art. (iPhone/iPad app by Yosuke Fujii.)

- Source: https://appshunter.io/ios/app/tsukibyobu-moon-screen/id6826440511 (this page in markdown: same URL + `.md`)
- Developer: [Yosuke Fujii](https://appshunter.io/developer/1089595725)
- Category: Lifestyle, Entertainment
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 27.0 · 4 MB
- Languages: American English, Japanese
- Released: 2026-10-27
- Data updated: 2026-11-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/tsukibyobu-moon-screen/id6826440511/reviews.md

## What is Tsukibyobu?

Tsukibyobu turns the iPhone in your hand into a byobu, a Japanese folding screen, and hangs a night inside it.

Closed, it is the new moon. Open, the full. On a foldable iPhone the hinge angle becomes the phase of the moon: open it a little for a crescent, halfway for the first quarter, all the way for the full moon. Stand it half-open on your desk and the two displays become the two panels of a screen.

The paintings follow the Rinpa school: tarnished gold-leaf mist, ultramarine and malachite hills, a silver-leaf moon, gold dust across the night sky. Mt. Fuji and a lake, Higashiyama, a pine beach, a mountain village. Plum in spring, irises in summer, pampas grass in autumn, snow-laden bamboo in winter.

Touch the moon and it tells you a story about tonight's phase. Turn on the sound for a faint, koto-like music whose scale changes with the season: brighter in spring, quieter in winter.

No notifications, no ads, no sign-in. Set it down, watch, and close it when the night is over.

On iPhones that do not fold, a slider at the bottom of the screen opens the moon.

## Key features

- Dynamic moon phase display
- Rinpa school art style
- Seasonal music and stories
- Interactive moon phase narration
- Foldable device integration
- Slider for non-foldable devices

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sound Box | $2.99 | one-time |


## Is Tsukibyobu safe?

Not enough ratings yet to assess Tsukibyobu.

## Is Tsukibyobu legit?

Tsukibyobu: Moon Screen appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Tsukibyobu is 75 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/tsukibyobu-moon-screen/id6826440511/reviews.md

### 4/5 — 癒される

*2026-10-27*

夏のホタルの演出が好きです。BGMも季節の音になったら嬉しいな

**Developer response:** レビューコメントありがとうございます！
BGMのバリエーションを増やすことは検討していたので、こちら増やし方のアイデアとして検討しますね

## Frequently asked questions about Tsukibyobu

### What is Tsukibyobu?

Tsukibyobu turns your iPhone into a Japanese folding screen, displaying a night sky with a moon whose phase changes. It features art inspired by the Rinpa school and offers seasonal music and narrated stories.

### How does the moon phase work on Tsukibyobu?

On foldable iPhones, the hinge angle dictates the moon phase. On non-foldable iPhones, a slider at the bottom of the screen controls the moon's phase, from new moon to full moon.

### Does Tsukibyobu have ads?

No, Tsukibyobu is ad-free. The app description explicitly states 'No notifications, no ads, no sign-in,' ensuring an uninterrupted experience.

### What kind of art is featured in Tsukibyobu?

The app showcases paintings in the Rinpa school style, featuring elements like mist, hills, silver-leaf moon, gold dust, Mt. Fuji, and seasonal motifs like plum blossoms and snow-laden bamboo.

### Is Tsukibyobu available on Android devices?

Based on the provided data, Tsukibyobu is only supported on iPhones. The 'supportedDevices' field lists only 'iphone'.

### How often is Tsukibyobu updated?

The app was last updated on November 7, 2026, with version 1.4.1. This indicates a recent update, suggesting ongoing development and support.

### What is the age rating for Tsukibyobu?

Tsukibyobu has an age rating of 4+. This means it is considered suitable for children aged 4 and above.

### Does Tsukibyobu offer any in-app purchases?

Yes, the app data indicates 'hasInAppPurchases' is true. While the app is free to download, there may be optional purchases available within the application.

## Version history (last 5 releases)

### 1.4.1 — 2026-11-07

Thank you for spending your evenings with Tsukibyobu. This time, you can enjoy it without touching the screen. From Siri or Shortcuts you can change the place or season, play or stop the music, and open the byobu. Ask Siri to tell you some moon trivia, and it will share a little story about the moon. Moon trivia is now available from VoiceOver as well, and the trivia card follows your device's text size.

### 1.4.0 — 2026-11-04

Thank you for spending your evenings with Tsukibyobu. This time, you can keep a night you love. A new share button among the chips turns the byobu on your screen, seal and all, into a single picture you can save to Photos or send to someone. We also reworked how the paintings are drawn, so the moon moves more lightly as you open the screen.

### 1.3.2 — 2026-10-31

Thank you for spending your evenings with Tsukibyobu. This update fixes a few minor bugs. May it keep you company on many quiet nights.

### 1.3.1 — 2026-10-30

Thank you for spending your evenings with Tsukibyobu. This update smooths out a few small things around the Sound Box, so you can enjoy it with even more peace of mind. May it keep you company on many quiet nights.

### 1.3.0 — 2026-10-30

Thank you for spending your evenings with Tsukibyobu. This time, the music of the night follows the seasons. The scale now changes through the year: a bright yo scale in spring, a cool ritsu in summer, the miyako-bushi in autumn, and a hushed in scale in winter. There is also the Sound Box, a one-time purchase: sounds of each place (water at the lake, a temple bell in Higashiyama, waves on the pine beach, a stream and insects in the village), the shō and shakuhachi, and melodies from any season.

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## More apps by Yosuke Fujii

- [ProgrammingQuiz](https://appshunter.io/ios/app/programmingquiz/id1089599534)
- [Eyequette（アイケット）](https://appshunter.io/ios/app/eyequette/id1115570275)
- [FFMultiplier](https://appshunter.io/ios/app/ffmultiplier/id1151801381)
- [チェケラ 〜すべての音が楽器になる音楽アプリケーション〜](https://appshunter.io/ios/app/id1209866956)
- [Graphica - Words to Shaders](https://appshunter.io/ios/app/graphica-words-to-shaders/id6782731783)
- [Intento - Todo Anywhere](https://appshunter.io/ios/app/intento-todo-anywhere/id6788623037)

All apps by Yosuke Fujii: https://appshunter.io/developer/1089595725

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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 2026-11-08.*