209+ iOS apps & games curated and reviewed
Every iPhone needs a few good idle koi fish apps and games. We benchmark 209+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 3.3★ (25) | Yes | No | May 2026 |
| 2 |  | Free | 4.7★ (2K) | Yes | Yes | Jul 2026 |
| 3 |  | Free | 4.8★ (4.5K) | No | No | Jul 2026 |
| 4 |  | Free | 4.8★ (29K) | Yes | Yes | Jul 2026 |
| 5 |  | Free | 4.5★ (454K) | Yes | Yes | Jul 2026 |
| 6 |  | Free | 4.8★ (5.6K) | Yes | Yes | Jul 2026 |
| 7 |  | Free | 4.8★ (2.6K) | Yes | Yes | Jul 2026 |
| 8 |  | Free | 4.7★ (8.5K) | No | Yes | Jul 2026 |
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.
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.
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.
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.
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?
An idle tycoon fishing game where you catch various fish, upgrade your equipment, and explore different locations. Aim to become the ultimate king of fish hunting in this engaging simulation.
Lead an army of anime-style fish warriors in this turn-based idle card game. Summon, nurture, and evolve your fish to unlock unique abilities and engage in strategic battles. Progress even when AFK with automatic resource collection and growth.
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.
Build and manage a thriving aquarium, attracting visitors and collecting diverse aquatic life. Upgrade exhibits, research marine species, and expand your facilities to earn money and become a wealthy aquarium tycoon.
Dive into an underwater world as an ordinary fish. Battle, eat, grow, and evolve to conquer the ocean. Merge with other fish, fight sharks, and ascend to become the ultimate overlord of the sea.
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.
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.
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.
Instantly identify fish species using your camera and access up-to-date local fishing regulations. Track your catches, log important fishing data, and store your licenses digitally. Premium features offer advanced identification, weather, and expert advice.
A relaxing idle game where you build and manage an underwater world. Your fish generate coins and progress even when you're offline. Defend your ocean from threats and enjoy casual gameplay with beautiful scenes.
Instantly identify fish species by taking or uploading a photo. Access a vast database with detailed information and helpful tips for fish keeping. Connect with a community for shared knowledge and insights.
Instantly identify fish species, weight, and length by snapping a photo. Log your catches with detailed notes, track personal bests, and compete on leaderboards. Build a digital collection of your fishing memories.
Experience a vibrant, interactive 3D aquarium on your device. Watch realistic fish swim, interact with them by touching the screen, and even download new species. Personalize your aquarium with custom backgrounds from your photo library.
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.
Experience a vibrant 3D aquarium on your device. Watch realistic fish swim and interact with them by touching the screen. Customize your aquarium with any image from your photo library and enjoy the immersive, water-filled environment.