208+ iOS apps & games curated and reviewed
Finding the right koi fish apps and games can be overwhelming with so many options. We've analyzed 208+ apps and games to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (29K) | Yes | Yes | Jul 2026 |
| 2 |  | Free | 4.7★ (2K) | Yes | Yes | Jul 2026 |
| 3 |  | Free | 4.0★ (8) | Yes | No | Jul 2026 |
| 4 |  | Free | 3.3★ (288) | No | Yes | Jun 2026 |
| 5 |  | Free | 4.1★ (28) | Yes | No | Jul 2026 |
| 6 |  | Free | 3.3★ (6) | No | No | May 2026 |
| 7 |  | Free | 3.8★ (330) | No | Yes | Jul 2026 |
| 8 |  | Free | 4.5★ (24K) | Yes | Yes | Jul 2026 |
Nurture and breed vibrant koi, guiding them through a serene journey to transform into majestic dragons. Customize your underwater sanctuary and create unique constellations in a breathtaking celestial realm.
Nurture and collect vibrant Koi fish in a serene underwater world. Watch them grow, evolve into majestic dragons, and discover hundreds of unique varieties. Share your collection with friends and enjoy a calming, visually stunning experience.
Design and maintain your own virtual koi pond. Care for your fish, customize the environment, and enjoy a peaceful, interactive aquarium experience.
Cultivate a vibrant aquatic ecosystem by raising, feeding, and breeding thousands of unique koi. Decorate your pond, interact with your fish, and explore friends' creations. Discover new koi through fishing and enjoy a serene, ad-free experience.
Observe and interact with beautiful koi and goldfish in a virtual aquarium. Increase their favorability, collect more fish, and unlock new views. Enjoy a relaxing experience with optional in-game currency for faster progression.
Immerse yourself in a tranquil digital koi pond. Interact with beautiful fish, customize your environment with various backgrounds and flora, and enjoy a rich selection of natural soundscapes for a stress-relieving and uplifting experience.
Create and customize your own tranquil koi pond. Interact with fish, decorate your garden, and discover rare breeds. Visit other ponds for inspiration and enjoy a peaceful, ad-free Zen experience.
An idle, relaxing game designed to relieve stress and calm the mind. Expand your aquarium, invite adorable fish friends, and enjoy a peaceful experience. Watch your underwater world grow and feel your worries melt away.
Create and manage your own vibrant 3D aquariums filled with a vast array of marine life. Buy, breed, and sell fish to expand your collection, customize your tanks with decorations, and enjoy realistic fish behavior and interactions.
Discover, collect, trade, and breed a vast array of unique frogs. Customize their habitats, earn awards, and play online or offline with beautiful graphics.
Build and manage your own underwater world by collecting various fish and sea creatures. Expand your aquarium, attract visitors, and earn money to upgrade your park and discover new aquatic life. Become the ultimate zoo tycoon in this addictive simulation game.
This premium, single-player game offers a serene escape with mesmerizing koi breeding and collection. Enjoy tranquil gameplay, enchanting music, and a visually stunning experience without ads or in-app purchases. Perfect for relaxation and mindful breaks.
A comprehensive fish encyclopedia and fishing guide in 50 languages. Discover detailed information on 800 fish species, including their habitats, feeding habits, and optimal fishing conditions. Includes helpful tools like a fisherman's calendar and knot guides.
Digitally manage your koi population and pond water quality. Track fish growth, calculate optimal feeding amounts, and monitor water parameters with automated analysis and suggestions. View trends with generated charts and manage multiple ponds.
Care for a vibrant ocean reef and collect hundreds of sea creatures. Discover new species, learn facts about marine life, and decorate your sanctuary. Participate in special events and connect with friends to build thriving underwater worlds.
Discover, collect, and breed beautiful koi fish to populate your virtual pond in this relaxing idle game. Progress through hundreds of levels and enjoy stress-free sounds for a calming experience.
Discover and nurture an enchanted fish pond, collecting a variety of freshwater species like fish, frogs, and turtles. Decorate your sanctuary, learn about your creatures, and participate in events to unlock new content. Enjoy hours of relaxing and cozy gameplay as you prepare your aquatic friends for their release.
Experience the serene beauty of realistic jellyfish on your device. Choose from multiple species, control their numbers, and interact with them. Enjoy calming visuals and sounds to relax anytime, anywhere.
Create and manage your own virtual aquarium empire. Choose from over 200 exotic 3D fish and sharks, and customize your underwater environments with more than 85 decorations. Buy, breed, and sell fish to earn coins and unlock new content.
Create and nurture your own virtual koi pond. Customize fish, environments, and watch them grow. This relaxing app offers a serene escape with beautiful graphics and calming sounds.