RYUKIN Downloads & RevenueRYUKIN · App Store
RYUKIN is #2 in Entertainment Paid in Japan and charting in 3 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
24 Sep 2026Full timeline · 22 events
- 📦RYUKIN updated to version 1.15.0- Added a holographic ghost
- Added floating jack-o'-lanterns in two colors
- Made other minor adjustments - 📈RYUKIN entered the top 100Top Paid · Entertainment · GB
- 📈RYUKIN charting in a new countryUnited Kingdom
- 📈RYUKIN new best rank in the overall chart: #108Top Paid · All Apps · AE
- 📈RYUKIN entered the top 10Top Paid · Entertainment · AE
- 📈RYUKIN charting in a new countryUnited Arab Emirates
- 📈RYUKIN entered the top 10Top Paid · Entertainment · ZA
- 📈RYUKIN charting in a new countrySouth Africa
- 📈RYUKIN entered the top 10 on iPad · Top Paid All AppsTR
- 📈RYUKIN entered the top 10 in 2 chartsTop Paid · Entertainment · SA · Top Paid · Entertainment · TR
- 📈RYUKIN charting in a new country in 2 chartsSaudi Arabia · Turkey
- 📦RYUKIN updated to version 1.14.6- Added support for iPhone Duo
- Fixed an issue where some visuals could appear extremely blurred when motion blur was enabled
- Made other minor improvements - 📈RYUKIN entered the top 100Top Paid · Entertainment · IN
- 📈RYUKIN charting in a new countryIndia
- 📈RYUKIN entered the top 100 in 2 chartsTop Paid · Entertainment · CN · Top Paid · Entertainment · US
- 📈RYUKIN charting in a new country in 2 chartsChina · United States
- 🌟RYUKIN featured by Apple: “おすすめのアプリ”today · JP
- 🌟RYUKIN featured by Apple: “おすすめのアプリ”today · JP
- 🆕RYUKIN first spotted by AppInsider#5 in Top Paid · Entertainment · Japan
- 🌟RYUKIN featured by Apple: “おすすめのアプリ”today · JP
- 📦RYUKIN version 1.14.5- Fixed an issue that could prevent the app from launching on macOS.
- Made minor adjustments. - 🆕RYUKIN released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Entertainment PaidRYUKIN at a glance
AI summary written from our chart and store data, 2026-11-09. It can be wrong: check the numbers above.
A premium interactive digital aquarium app that simulates realistic goldfish behavior and customization options for users seeking a calming, low-maintenance visual experience. The app is currently ranked #2 in the Japanese paid entertainment category and #82 in South Korea, indicating strong regional traction in East Asian markets.
Similar apps: Aquarium Live Wallpaper, Fish Pond Simulator, Zen Garden
RYUKIN on the App Store
App details
RYUKIN downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where RYUKIN's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Business model: Ad-led
How RYUKIN makes money: subscriptions, one-off purchases and ads.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | EntertainmentPaid | #2 |
 South Korea | EntertainmentPaid | #82 |
 Taiwan | EntertainmentPaid | #115 |
Apps near RYUKIN on the chart
Entertainment Paid, around #2.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about RYUKIN
From the 17 most recent App Store reviews in the US.
Users overwhelmingly praise the app's stunning visuals, lifelike physics, and calming atmosphere, often using it as a digital wallpaper or stress-relief tool. While satisfaction is high, some users express frustration with the paywall structure for additional fish colors and customization options.
Mostly positive (100% of recent reviews give 4–5 stars). People like it for good value, and its design.
What people like
- Price & subscription: “Outstanding value for the price, I love that I (gladly) pay for only the fish I want”
- Design: “Beautiful to see it come to life”
- Fun: “I hope the dev continues to add fun new content in the future”
- Updates: “Regular updates and improvements, developer is a dedicated artist!”
About RYUKIN
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
