Comparison

RYUKIN vs Cherimo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RYUKIN

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.

Highlights
  • 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
Features
Read full description

~ 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

About

Cherimo

Features
Read full description

Cherimo is your private memory app for the people who matter — a partner, your children, your parents, or friends. Add more than one person and keep each of them separate. Save their likes and dislikes, anniversaries, gift history, food and allergy notes, and the little things they mention in conversation. Easy to forget, all in one place. It's more than notes. AI organizes and summarizes what you save, then suggests gifts, date plans and small gestures — so you can be more naturally thoughtful. What you can do - Add several people, likes & dislikes, anniversary & birthday reminders - Gift ideas & history, food & health notes - Conversation notes, memory log, profile for each person AI Assistant (powered by Claude) Gift ideas, date plans, message drafts, info extraction, relationship summary, care tips. Plus adds Preference Graph & Gift Score; Pro adds Restaurant Check, Occasion Planner & Chat AI. Plans Free (3 people, 5 AI/mo, with ads) Cherimo Plus (Monthly) — $4.99/month: 10 people, unlimited records, 50 AI/mo, image upload, no ads Cherimo Pro (Monthly) — $9.99/month: unlimited people, 250 AI/mo, Pro-only AI, Chat AI, no ads Plus and Pro are auto-renewable subscriptions with a one-month term. They renew automatically unless cancelled at least 24 hours before the end of the current period. Cancel any time in Settings > Apple Account > Subscriptions. Terms of Use and Privacy Policy Terms of Use: https://cherimo.app/en/terms Privacy Policy: https://cherimo.app/en/privacy Apple standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ On privacy Not about monitoring anyone — your own private record to help you stay thoughtful. Your data is yours. Remember the little things that matter. Accessibility Full VoiceOver support. Every screen is usable with a screen reader. Icon-only buttons and text fields have spoken labels, deleting a record works through accessibility actions as well as long press, and the anniversary widget reads as one natural sentence.

Screenshots

RYUKIN4 screens
Cherimo4 screens

Verdict

The call

The clearest difference is price: Cherimo at Free against RYUKIN's $3.49. RYUKIN's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Cherimo is free to download; RYUKIN costs $3.49 up front. RYUKIN sells 10 one-off in-app purchases and Cherimo sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RYUKIN ships an update every 8 days, Cherimo weekly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
RYUKIN versus Cherimo: the parameters behind the verdict, then further details
ParameterRYUKINCherimo
Price$3.49Free — better
Rating4.9 (62 ratings) — better—
Positive reviews94.0% of reviews—
Number of ratings62 — better—
Update frequencyEvery 8 daysWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better16.4
Further details — not scored
Size229 MB68 MB
Age rating4+4+
DeveloperMasataka HakozakiHiroki Nomura

Bugs and requests

RYUKIN

Reported bugs

1 issue
  • Occasional crashing on high-end devices

Requested features

5 requests
  • Ability to change fish colors
  • Add more fish species (e.g. bettas, tetras)
  • Implement fish breeding/growth mode
  • Allow customizing fish placement in tank
  • Add desktop/widget mode for always-on display

Cherimo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

RYUKIN

One-time10
  • ROBO FISH 02$1.99
  • GHOST TRANSLUCENT$1.99
  • GHOST BLACK$1.99
Show 7 more
  • RED RYUKIN$1.99
  • RED-WHITE RYUKIN$1.99
  • CALICO RED/WHITE/BLACK$1.99
  • YELLOW GOLD RYUKIN$1.99
  • CALICO KITTY FISH$1.99
  • SKELETON FISH$1.99
  • PANDA TELESCOPE$1.99
2 purchases

Cherimo

Subscriptions2
  • Cherimo Plus$4.991 Month
  • Cherimo Pro$9.991 Month

Questions

Is RYUKIN free?
RYUKIN costs $3.49, and also offers in-app purchases.
Is Cherimo free?
Cherimo is free to download, with in-app purchases available.
Do RYUKIN or Cherimo have ads?
Cherimo shows ads; RYUKIN does not.
Which is updated more often, RYUKIN or Cherimo?
RYUKIN ships an update every 8 days, and Cherimo weekly. Most recently, RYUKIN was updated on November 8, 2026 and Cherimo on October 31, 2026.

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