# Ukabu

> Ukabu (iPhone/iPad app by Naoki Ishii.)

- Source: https://appshunter.io/ios/app/ukabu/id6776264618 (this page in markdown: same URL + `.md`)
- Developer: [Naoki Ishii](https://appshunter.io/developer/1896482186)
- Category: Entertainment, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 31 MB
- Languages: American English
- Released: 2026-06-07
- Data updated: 2026-09-05
- User reviews in markdown: https://appshunter.io/ios/app/ukabu/id6776264618/reviews.md

## What is Ukabu?

UKABU is a quiet notebook for gently lightening your mind.

Toss a passing thought and it drifts onto the screen.
Tap to read it; swipe up to let it go.
Released notes don't vanish — search, and you can always reel them back.

Don't hold it all. But nothing is truly lost.
That's the quiet comfort of UKABU.

— 12 lenses, 12 inner landscapes —
Lotus, Sakura, Ink, Mountains, Pond, Ripple, and the night-sky "Stars."
Choose the scenery by mood. A thought you let go rises as a shooting star,
and tilting your phone lets you look up into the depth of the sky.

— Reel it back —
Find past notes by text, place, or time.

◎ No ads
◎ Notes stay on your device (yours alone)
◎ 11 languages (English, Japanese, Chinese, Spanish, Portuguese, French, German, Korean, Hindi, Indonesian, Arabic)

PRO (one-time purchase)
• 3 extra lenses (Lantern, Pond, Ripple)
• Flow styles (sink / rise / swirl) & auto-play

Toss it, reel it back, take it out.
Float today's small thoughts here for a while.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lenses | $1.99 | one-time |



## Version history (last 5 releases)

### 2.4 — 2026-06-21

• New lens "Stars": thoughts you let go rise as shooting stars, and the longer you watch, the more stars quietly appear (tilt to look up)
• Now available in 11 languages
• Refreshed app icon
• Refined the pond's floating leaves; tweaks and stability improvements

### 2.3 — 2026-06-15

• New lens "Stars": thoughts you let go rise into the night sky as shooting
  stars, and the longer you watch, the more stars quietly appear (tilt to look up)
• Now in 11 languages (English, Japanese, Chinese, Spanish, Portuguese,
  French, German, Korean, Hindi, Indonesian, Arabic)
• Refreshed app icon
• Minor tweaks and stability improvements

### 2.1 — 2026-06-14

New lens: "Stars."

Thoughts you let go rise into the night sky as shooting stars,
and the longer you stay, the more stars quietly appear.
Tilt your phone to look up and feel the depth of the sky.

• "Sansui" deepened: tilt to peer into the valley, light that shifts through the day
• Fixed a bug where held notes disappeared after restart
• Minor tweaks and stability improvements

### 2.0 — 2026-06-13

New Theme Added: "Sazanami (Ripples)" (PRO) — Inspired by Hokusai and Rinpa style waves.

Multi-layered Sea: Combines a deep-sea background, Seigaiha (traditional wave patterns), parallax ghosts, dual-speed water lines, bubble trails, mist, crashing waves, and whirlpools—each moving at unique speeds to create depth and a natural flow.

Notes as Small Boats: Your thoughts float as tiny boats. Pulling them closer (bringing them to the surface) reveals a Japanese paper card where you can read your text.

Seamlessly blends large waves into the water with gentle animations of light and current.

UI Update: "Sazanami" is now placed next to "Pond" (Nature group) on the theme bar.

PRO Features: Integrated into the same one-time purchase as Lantern and Pond. Updated PRO descriptions and help guides to reflect the "3 Premium Themes (Lantern, Pond, Sazanami)."

Bug Fixes: Removed the faint vertical lines caused by the grid pattern embedded in the background material.

### 1.8 — 2026-06-12

• The water-lily pond feels more alive — each leaf now carries its own character, and soft light drifts slowly across the water.
• Fixed an issue where kept notes could go missing after a restart.

## More apps by Naoki Ishii

- [NEKO FLOW](https://appshunter.io/ios/app/neko-flow/id6767510390)
- [SealCalc](https://appshunter.io/ios/app/sealcalc/id6775308959)
- [Miharashi](https://appshunter.io/ios/app/miharashi/id6775440719)
- [写真番](https://appshunter.io/ios/app/id6779160819)

All apps by Naoki Ishii: https://appshunter.io/developer/1896482186

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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 2026-09-05.*