239+ iOS apps & games curated and reviewed
Whether you're new to koi fish games or looking for an upgrade, our curated collection of 239+ iOS apps and games has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.
| # | 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 | 4.8★ (12K) | Yes | Yes | Jul 2026 |
| 4 |  | Free | 4.8★ (4.8K) | No | No | Jul 2026 |
| 5 |  | Free | 4.7★ (16K) | Yes | Yes | Jul 2026 |
| 6 |  | Free | — | No | No | May 2026 |
| 7 |  | $2.99 | 4.8★ (13) | No | No | Jun 2026 |
| 8 |  | Free | 4.7★ (8.5K) | No | 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.
Control a baby shark in a vibrant aquarium, hunting smaller fish and avoiding predators. Eat sushi to boost your power and collect fish heads to dominate the sea and become king. Engage in thrilling io gameplay against players worldwide.
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.
Lead a school of fish to grow by collecting others and swallowing opponents. Upgrade your fish to become the largest and rule the underwater kingdom. Engage in survival challenges and mini-games.
Breed and discover unique koi fish in an infinite procedurally generated world. Collect your favorite patterns as trading cards and share them with others. Explore new mutations and fill your koi book.
Lead a school of fish to survive in a dangerous ocean. Grow your group, collect eggs, and discover new species while avoiding predators. Enjoy vibrant graphics and engaging missions.
Engage in a thrilling multiplayer arena as a shark with a sword. Hunt other fish, collect trophies, and consume sushi to grow stronger. Dominate the ocean and become the king of the sea in this free-to-play IO game.
Become a predator in a vibrant underwater world. Hunt for smaller fish to grow and survive, while avoiding larger predators. Experience a relaxing yet engaging fishing adventure.
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.
Dive deep into the ocean to catch a variety of fish. Upgrade your gear to reach new depths, discover rare species, and earn money even when you're offline. Can you uncover the ocean's secrets?
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.
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.
Create and customize your own vibrant underwater world with a vast array of fish, sea creatures, and decorations. Raise and breed exotic fish, discover new species, and connect with a community of fellow aquarium enthusiasts through chat and gifting.
Control a fish in the ocean and eat smaller fish to grow bigger. Avoid larger fish and sharks while collecting starfish to increase your score and progress through levels.
Navigate the deep ocean, consuming smaller fish to grow larger and evolve through multiple stages. Become the ultimate predator in this action-packed survival game.
Engage in thrilling online fishing and slot games with high-quality 3D graphics and underwater themes. Battle with up to four players to catch a variety of fish characters, utilizing special power-ups and mini-games for enhanced gameplay and win multiplication.
Collect coins to feed adorable Koi carps and watch them grow. Navigate obstacles, customize your pond, and unlock premium Koi varieties. A relaxing game of growth and collection.
Engage in thrilling underwater battles with a variety of fish characters and powerful special abilities. Compete with up to four players to catch the most fish and multiply your wins. Experience high-quality 3D graphics and immersive undersea themes.