RYUKIN1.14.6 - App Store

～ Gracefully Fluttering Goldfish ～
Goldfish glide gracefully through crystal-clear water, their fins fluttering gently as they swim. Their charming gestures and soft, delicate fin movements have been carefully recreated. Enjoy the beauty of goldfish anytime, anywhere - without the need for water changes or feeding.
App Highlights
- Fish respond to your touch and follow your finger
- Customize tank shape, background color, and floating objects
- Soothing water sounds and clear, refreshing visuals
- "Cat & Baby Mode" for safe play with kittens and toddlers
- Sleep timer for relaxing bedtime use
- Play your favorite music while watching the aquarium
- Clock and date display
- White and black goldfish included; colorful and themed fish available via in-app purchase
Settings & Customization
- Camera options (Free position / Follow fish / Auto-rotation)
- Screen orientation
- Tilt sensitivity
- Sleep timer
- UI size
- Toggle water surface, bubbles, and other effects
- Adjust brightness, saturation, contrast, and color tone
- Quality settings (resolution and various effects)
- Volume settings (water sounds, bubble sounds)
- Clock & date options (font, position, size)
Other Features
- Fish, objects, and the water surface respond to touch and device tilt
- Fish may whimsically swim toward your finger
- Tap too much and the fish may faint!
- Feed the fish
- Adjust the size of fish and objects
- Display up to six fish at once
‥∴ Bringing the Allure of Goldfish Closer ∴‥
This app was born from a childhood dream of recreating goldfish through programming. Fifteen years after the release of the original app *Wa Kingyo*, countless refinements have been made to capture the graceful and charming nature of these fish. From the gentle movement of their fins to the way they chase and munch on food, experience the beauty and warmth that goldfish bring.
News and Support
X: @m_hakozaki
TikTok: @m_hakozaki
Instagram: @masataka.hakozaki

Version History - Added support for iPhone Duo
- Fixed an issue where some visuals could appear extremely blurred when motion blur was enabled
- Made other minor improvements 1.14.6 4d ago - Fixed an issue that could prevent the app from launching on macOS.
- Made minor adjustments. 1.14.5 Jul 19 - UI fixes and improvements 1.14.4 Apr 5 - Fixed an issue where sound would not resume after returning from the background on devices in silent mode
- Fixed an issue where background audio would stop when launching the app while the device was in silent mode
- UI fixes and improvements 1.14.3 Apr 3 - UI fixes and improvements 1.14.2 Mar 31 [Fixed]
- Fixed an issue where gradients did not display smoothly on certain devices
- Various minor improvements and fixes

[Added]
- Art style option: Normal / Pixel Art
- Wireframe goldfish
- Adjustable lens distortion and vignette effects 1.14.1 Mar 20 - Added low-poly goldfish
- Added new objects
- Added fish, camera view, and object position memory per aquarium
- Added an overall size adjustment for fish and objects
- Added UI background panel transparency adjustment
- Added tone curve adjustments
- Added a setting to lock the sound environment (underwater / above water)
- Other minor adjustments 1.14.0 Mar 1 - Made various minor adjustments. 1.13.6 12/14/2025 - Added support for iPadOS 26 Multi Window and Slide Over.
- Improved fin movements.
- Made minor adjustments. 1.13.5 12/06/2025 - Fixed an issue where the screen turned black when switching apps. 1.13.3 11/06/2025 - Added two new Halloween ghost fish: Luminous & Translucent.
- Fixed a bug where the UI sometimes didn't update when switching tanks.
- Made various minor adjustments. 1.13.2 11/02/2025 - Added new Halloween fish: Black Ghost.
- Made various minor adjustments. 1.13.1 10/28/2025 - Added new Halloween fish: Ghost.
- Made various minor adjustments. 1.13.0 10/27/2025 - Bug fixes and stability improvements.

1.12.0
- A new tank, Crystal, has been added.
- Display settings can now be customized for each tank.
- Made various minor adjustments.
- This version requires iOS 16 or later. 1.12.2 09/03/2025 - Bug fixes and stability improvements.

1.12.0
- A new tank, Crystal, has been added.
- Display settings can now be customized for each tank.
- Made various minor adjustments.
- This version requires iOS 16 or later. 1.12.1 08/27/2025 - A new tank, Crystal, has been added.
- Display settings can now be customized for each tank.
- Made various minor adjustments.
- This version requires iOS 16 or later. 1.12.0 08/23/2025 - Bug fixes and stability improvements.

1.11.0
- Added new objects: bubbles and balloons.
- Added 3 new tanks.
- Added a field of view adjustment slider.
- Added background gradient intensity adjustment settings.
- Bug fixes and adjustments. 1.11.5 08/08/2025 - Bug fixes and stability improvements.

1.11.0
- Added new objects: bubbles and balloons.
- Added 3 new tanks.
- Added a field of view adjustment slider.
- Added background gradient intensity adjustment settings.
- Bug fixes and adjustments. 1.11.4 08/04/2025 - Fixed bugs and made minor adjustments.

1.11.0
- Added new objects: bubbles and balloons.
- Added 3 new tanks.
- Added a field of view adjustment slider.
- Added background gradient intensity adjustment settings.
- Bug fixes and adjustments. 1.11.2 08/03/2025 - Fixed bugs and made minor adjustments.

1.11.0
- Added new objects: bubbles and balloons.
- Added 3 new tanks.
- Added a field of view adjustment slider.
- Added background gradient intensity adjustment settings.
- Bug fixes and adjustments. 1.11.1 07/30/2025 - Added new objects: bubbles and balloons.
- Added 3 new tanks.
- Added a field of view adjustment slider.
- Added background gradient intensity adjustment settings.
- Bug fixes and adjustments. 1.11.0 07/29/2025 - Resolved UI rendering issues. 1.10.1 06/17/2025 - Added 10 new fish.
- Added 9 new objects (Marguerite [white, yellow, mixed], Rose [white, pink], Maple leaf [green], Pebbles [white, mixed]).
- Added a new aquarium.
- Added an option to adjust the intensity of the lens chromatic aberration effect.
- Added an option to keep as many fish in view as possible.
- Other minor fixes and adjustments. 1.10.0 06/07/2025 - Added a new tank with a cherry blossom tree.
- Added an option to flip the clock display.
- Added support for 90Hz and 120Hz frame rates.
- Optimized rendering performance.
- Made minor adjustments and improvements. 1.9.0 04/05/2025 - Fixed an issue preventing launch on Arabic-language devices.
- Made minor adjustments. 1.8.1 03/08/2025