Koi Rising: Calm Game
Lean in and the koi come up
Only for iPhone
$1.99 · Designed for iPhone. Not verified for macOS.
iPhone
Lean in. They rise. Draw back. They sink. Open your mouth and the pond empties in a heartbeat. Eleven ponds and one school of Koi.
A pond on your screen, seen from above, and the koi know you are there.
Hold your phone over the water and lean in. The school rises to meet you, the way koi crowd to someone standing at the edge of a pond. Draw back and they settle into the deep. Open your mouth, or move suddenly, and the whole pond scatters and dives for the bottom.
The water is real water. Waves run at the speed their own length says they should, so the surface never repeats. Light catches the ripples. Rain comes and goes, wind gets up and dies away, and the weather is different in every pond.
Eleven ponds, swiped left and right:
• Clear Day — bright overcast water you can see a good way into
• Ink Wash — sumi-e on paper, every koi in one loaded brush
• Watercolour — wet-on-wet, the paper showing through
• Moonlit — almost no light, and hard silver off the surface
• Autumn — tannin-brown water with maples coming down on it
• Last Light — the last half hour of sun, straight down the pond
• Cherry Blossom — petals thick on pale spring water
• Lantern Night — paper lanterns lit and set adrift
• Jade Water — so clear it barely takes anything
• Storm — flat grey water being rained on properly
• Neon — magenta off the surface, koi in cyan, black water under both
Drag across the screen and the boundary between one pond and the next follows your finger.
The koi are koi, not sprites:
• Each fish swims on its own clock. No two tails keep the same time.
• They bend into a turn before the heading follows, and the tail sweeping against that curve is what pushes them round.
• They stack through the whole depth of the pond. Some cruise the bottom, some hang at the surface.
• Deep fish lose their colour the way water takes it: red first, then green, with blue carrying furthest — so a koi on the bottom is a dark shape and one at the surface is fully itself.
• Kohaku, showa, utsuri, yamabuki and more, each with its own markings.
Made to be calm:
• Nothing on screen but the pond. No buttons, no scores, no timers, no streaks.
• Nothing startles. No flashes, no jumps, no sound.
• Face tracking runs entirely on your device. The camera picture is never shown, never saved and never sent anywhere.
No ads, ever:
• No interruptions, no pop-ups, no videos to watch. Safe to hand to a child.
Requires an iPhone with a front camera and iOS 17 or later.
Ratings & Reviews
The developer, Yang Zhang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yang Zhang
- Size
- 111.7 MB
- Category
- Entertainment
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
• iPhone 6S
• iPhone 6S Plus
• iPhone SE (1st generation)
• iPhone 7
• iPhone 7 Plus
• iPhone 8
• iPhone 8 Plus
• iPhone X
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e
• iPhone 18 Pro
• iPhone 18 Pro Max
• iPhone Duo - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Yang Zhang
