iPartyHeteroptics vs RYUKIN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iPartyHeteroptics
Explore ten types of optical illusions by interacting with shapes and patterns. Manipulate lines, squares, and circles to experience visual mysteries and become the life of the party with these engaging illusions.
- Ten types of optical illusions
- Interactive shape manipulation
- Visual mystery experiences
- Party entertainment content
- Engaging pattern distortion
- Size and color perception illusions
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[Basic information] iPartyHeteroptics is a profitable application to be able to experience ten kinds of heteroptics contents by operating it while making it. Please move a straight line, a triangle, and patterned icon, stop the moving figure, and experience the mystery of various heteropticses ! Let's become the center of the topic of the party by using ten kinds of heteroptics contents ! (1)"Circle of different size ?" : Mysterious circle that seems quite different size though it is the same size, by surrounding circles bigness and smallness (2)"Distorted square ?" : Mysterious square that seems distorted by fan straight line position (3)"Is different straight line length ?" : Mysterious straight line that looks long or short, by arrow that changes angle and opens and shuts (4)"Inclining parallel lines ?" : Mysterious parallel lines that seems inclined by detailed slash that changes angle (5)"Parallelogram of different size ?" : Mysterious parallelogram that seems completely different size by a position (6)"Different color ?" : Mysterious gray square that seems quite different color of density by the changing background color (7)"Circle of lattice pattern that begins to move ?" : Mysterious lattice patterned circle that seems to begin moving like it on drop of water when putting it in lattice pattern (8)"Is the pattern distorted ?" : Mysterious pattern to which it begins to distort the horizontal, vertical line when putting it in lattice pattern (9)"Triangle that does expansion reduction ?" : Mysterious equilateral triangle into which size seems to have changed by place where triangle is put (10)"In which direction is this penguin rotating ?" : Clockwise? Anti-clockwise? In which direction does the penguin seem to be rotating for you ? How do you surprise a surrounding person ? It is depending on you how to use the content of "iPartyHeteroptics". Please brighten up the party by the way only of you. [Web site] iPartyHeteroptics Official site http://www.adp.co.jp/iph_top/ Our official site http://www.adp.co.jp/
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.
- 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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~ 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
Screenshots
Verdict
The clearest difference is in-app purchases: iPartyHeteroptics at none against RYUKIN's 10. iPartyHeteroptics also leads on price ($0.99 vs $3.49) and iOS requirement (13.0 vs 16.0). RYUKIN's advantage is update cadence (every 8 days vs every 60 months). On review sentiment, ads, monetization model and device support 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
iPartyHeteroptics costs $0.99 and RYUKIN $3.49 up front. RYUKIN sells 10 one-off in-app purchases. iPartyHeteroptics asks for nothing beyond the download.
iPartyHeteroptics ships an update every 60 months, RYUKIN every 8 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | iPartyHeteroptics | RYUKIN |
|---|---|---|
| Price | $0.99 — better | $3.49 |
| Rating | — | 4.9 (62 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 94.0% of reviews |
| Number of ratings | — | 62 — better |
| Update frequency | Every 60 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 214 MB | 229 MB |
| Age rating | 4+ | 4+ |
| Developer | Amenity Design&Planning ,Ltd. | Masataka Hakozaki |
Customer experience
iPartyHeteroptics
RYUKIN
Bugs and requests
iPartyHeteroptics
Not enough reviews yet to summarise bugs or 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
In-app purchases
iPartyHeteroptics
No in-app purchases
RYUKIN
- ROBO FISH 02$1.99
- GHOST TRANSLUCENT$1.99
- GHOST BLACK$1.99
Show 7 moreShow fewer
- 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
Questions
Is iPartyHeteroptics free?
Is RYUKIN free?
Do iPartyHeteroptics or RYUKIN have ads?
Which is updated more often, iPartyHeteroptics or RYUKIN?
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