asckoii: ASCII Koi Pond
Breed koi. Build a zen garden.
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
A koi pond drawn in letters. One tap turns it into paint, dots, a woodblock print or pixels.
No ads. No purchases. No account.
Feed your koi, pair them, and watch the eggs hatch. A young koi takes its pattern from both parents, so no two koi look alike. Fill the Koidex with all 18 varieties, from Kohaku and Showa to Yamato Nishiki. Now and then a wild koi visits the pond and brings new varieties into your line.
FIVE WAYS TO SEE IT
ASCII draws the whole pond in letters. Paint is soft gouache. Tone draws it in dots, Ukiyo-e as a woodblock print, and Pixel in pixels. Each style has an Ink version in black and white. The light follows your clock from dawn to night, or you can keep one time of day.
A POND THAT KEEPS LIVING
The pond goes on while you are away. A Home Screen widget shows your koi, how hungry they are, and the next eggs to hatch. A Live Activity counts down to a hatching on the Lock Screen, and in the Dynamic Island on iPhones that have one. If you want them, notes tell you when eggs hatch, when a season turns, or when the koi have gone a whole day without food.
LISTEN
The pond makes its own quiet sound: moving water, a drip now and then, and a soft hiss when it rains. It mixes with your music, it is silent when your iPhone is on silent, and you can turn it off in Settings.
WEATHER AND SEASONS
Rain and cloud come and go by themselves. You can also pin the weather, or choose Live to match the sky where you are, through Apple Weather. The seasons follow the calendar: cherry petals in spring, lotus in summer, maple leaves in autumn, snow in winter.
BUILD
Start from one of four ponds. Dig and fill the banks, lay bridges, and place teahouses, lanterns, trees and seasonal pieces. Each new variety in the Koidex opens more to build and more land to build on.
VISITORS
A heron at the bank, a frog on a lily pad, a turtle, ducks, a dragonfly, a cat.
PHOTO MODE
Hide the controls and take a picture of the pond at the full resolution of the screen. Save it or share it.
FOR TWO
Turn on relationship mode for the Us page: a photo of you two, your names, how long you have been together, the next milestone, and the dates you want to remember. It stays on this phone.
FREE AND PRIVATE
asckoii is free. It has no ads, no in-app purchases and no account. The developer collects no data, and your pond stays on your phone.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Waterfalls are easier to read. The water now pours from a clean edge into white foam, and rings spread across the darker pool below, so you can see at a glance which way each fall runs. A fall that pours away from you shows the drop past its edge.
The developer, LUCA TOMAS SCHNABEL, 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
- LUCA TOMAS SCHNABEL
- Size
- 9.5 MB
- Category
- Simulation
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Luca Schnabel