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RYUKIN

RYUKIN

Gracefully Fluttering Goldfish

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

Details

Released
March 12, 2024
Updated
October 27, 2026

Features

Developer

Masataka Hakozaki
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RYUKIN video #1 for iPhone
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RYUKIN screenshot #9 for iPhone
iphone
ipad
🧾$0.99 - $1.99
In-App Purchase↘︎
📌Ready
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About

Experience the serene beauty of a virtual goldfish aquarium. Customize your tank, interact with the fish, and enjoy soothing sounds. Features a special mode for young children and a sleep timer for relaxation.

✓Interactive goldfish that respond to touch
✓Customizable tank shape and background
✓Soothing water sounds and visuals
✓Cat & Baby Mode for safe play
✓Sleep timer for bedtime
✓Clock and date display
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What users say about RYUKIN

Reviews of RYUKIN are mostly positive: the Entertainment app is rated 4.9/5 from 62 App Store ratings. What users like most: gorgeous and lifelike fish, beautiful and customizable environments. Top complaints: high battery consumption on max settings, additional fish require paid purchases. Summarized from real user reviews.

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
+1

What's New in RYUKIN

1.15.0

October 27, 2026

- Added a holographic ghost - Added floating jack-o'-lanterns in two colors - Made other minor adjustments

More
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 ✨
GGoldfishcracker🌝

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
T😛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
MMySassy

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 is RYUKIN?

RYUKIN is a virtual goldfish aquarium app that allows you to enjoy the beauty of goldfish without the need for real-world maintenance. It offers customizable tanks, interactive fish, and soothing ambient sounds for a relaxing experience.

How much does RYUKIN cost?

RYUKIN is a paid application, priced at $3.49. This one-time purchase grants you access to the full application and its core features.

Does RYUKIN have ads?

No, RYUKIN does not contain advertisements. As a paid application, it provides an uninterrupted and immersive experience for users.

What devices does RYUKIN support?

RYUKIN is designed for iOS devices, specifically supporting iPhones and iPads. It is rated for ages 4 and up.

Can I customize the aquarium in RYUKIN?

Yes, RYUKIN offers extensive customization options. You can adjust tank shape, background color, floating objects, camera angles, and various visual effects like brightness and saturation.

Are there additional fish available for purchase in RYUKIN?

Yes, while white and black goldfish are included, colorful and themed fish are available via in-app purchase. Users have noted that additional fish require paid purchases.

How often is RYUKIN updated?

The latest version of RYUKIN is 1.15.0, last updated on October 27, 2026. While specific update frequency isn't detailed, the app has undergone significant refinements over its development history.

What do users like most about RYUKIN?

Users frequently praise the gorgeous and lifelike fish, beautiful and customizable environments, and soothing water sounds. The immersive and relaxing experience is also a major highlight, with some enjoying the fun fantasy fish designs.