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RYUKIN

RYUKIN

Gracefully Fluttering Goldfish

60 ratings
100 reviews
💪 Health & Fitness
🎬 Entertainment
$3.49
In-App Purchases

Details

  • Released
  • Updated
  • March 12, 2024
  • July 19, 2026

Features

Developer

Masataka Hakozaki
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RYUKIN video #1 for iPhone
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iphone
ipad
🧾$0.99 - $1.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐100
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
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📦~ in 5 days
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About

Experience the serene beauty of goldfish swimming in a customizable virtual aquarium. Interact with the fish, adjust tank settings, and enjoy soothing visuals and sounds. Perfect for relaxation or a calming presence.

✓Interactive goldfish that respond to touch
✓Customizable tank shape and background
✓Soothing water sounds and visuals
✓Cat & Baby Mode for safe interaction
✓Sleep timer for bedtime use
✓Play your own music
✓Clock and date display
Show original description

What users say

Summarized from real user reviews of RYUKIN. Based on 60 reviews and a 4.9/5 average, it highlights the 6 positives and 4 negatives reviewers mention most about this Entertainment app.

Positive things

  • 💎Gorgeous and lifelike fish
  • 🎨Beautiful and customizable environments
  • 🎶Soothing water sounds
  • 🕰️Useful clock feature
  • 👍Immersive and relaxing experience
  • 🐱Fun fantasy fish designs (e.g. cat-eared)

Negative things

  • 🔋High battery consumption on max settings
  • 💰Additional fish require paid purchases
  • 🌱Lack of plant/natural decor options
  • 🐟Limited variety of standard goldfish
See all reviews

What's New in RYUKIN

1.14.5

July 19, 2026

- Fixed an issue that could prevent the app from launching on macOS. - Made minor adjustments.

6

Subscriptions & In-App Purchases

$1.99

ROBO FISH 02

ROBO FISH 02 (TWO INCLUDED)

User reviews

Most RecentHighest RatedLowest Rated

Best app everrr

Literally the best app ever but the only thing is that I wish you could like change the size of the round tank with all the plants and decore because it’s kinda small but that’s it!!! But nothing needs changing at all x ✨
Goldfishcracker🌝Goldfishcracker🌝

Best game for stress from school or work

This game is worth all the money 💵 so calming good before bed my persian cat loves it to very calm ☺️ love this app no complaints so soothing to the mind BEST GAME EVER I love it even more cause I own a loin head goldfish and a ranchu goldfish in real life so I love it so much
Theater actor 😛🐯🎭Theater actor 😛🐯🎭

귀엽고 조용하고 예뻐요 :)

평소에도 물멍을 좋아해서 잘 사용하고 있습니다. 감사합니다.

평소 공부하거나 책을 읽을 때 앱을 사용하는 편이기에 타이머 등의 시계 외 기능 추가 / 위젯 추가 등의 계획은 없을까요?
쀏쀏

Unironically best game

Yahhhhhhh take my money this is so great I love how beautiful the animations lighting and physics are it’s gorgeous keep up the good works
MySassyMySassy

非常非常棒 希望一直坚持下去

是忠实付费用户了 几款app又能硬控我又能硬控猫 非常棒
关山不渡月关山不渡月
See 95 more reviews

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User experience

🐞

Reported Bugs

1 issue

Occasional crashing on high-end devices

Bug
✨

Requested Features

5 requests

Ability to change fish colors

Feature

Add more fish species (e.g. bettas, tetras)

Feature

Implement fish breeding/growth mode

Feature

Allow customizing fish placement in tank

Feature

Add desktop/widget mode for always-on display

Feature

FAQ

What does the RYUKIN app do?

RYUKIN is a virtual aquarium app that allows you to enjoy the beauty of gracefully fluttering goldfish anytime, anywhere. It recreates the charming gestures and delicate fin movements of real goldfish, providing a serene and visually appealing experience without the need for actual fish care.

What are the key features of RYUKIN?

Key features include interactive goldfish that respond to touch, customizable tank shapes and backgrounds, soothing water sounds, a 'Cat & Baby Mode' for safe interaction, a sleep timer, and the ability to play your own music while watching the aquarium. You can also display up to six fish and customize their size.

Is RYUKIN free to download and use?

The app is free to download and offers a base experience with white and black goldfish. Additional colorful and themed fish are available for purchase through in-app purchases, allowing you to expand your aquarium's variety.

What devices is RYUKIN compatible with?

While specific OS versions are not detailed, the app is designed for mobile devices and offers various settings for screen orientation, tilt sensitivity, and UI size, suggesting compatibility with a range of smartphones and tablets.

How can RYUKIN be used for relaxation?

The app is designed for relaxation through its soothing water sounds, clear visuals of gently swimming goldfish, and customizable ambiance. The sleep timer feature makes it ideal for use before bedtime, and the ability to play personal music further enhances its calming effect.