# Koidoku: Koi Water Puzzle — Calm puzzles & your koi pond > Calm puzzles & your koi pond (iPhone/iPad app by Autobot Industries Private Limited.) - Source: https://appshunter.io/ios/app/koidoku-koi-water-puzzle/id6820967373 (this page in markdown: same URL + `.md`) - Developer: [Autobot Industries Private Limited](https://appshunter.io/developer/6801561040) - Category: Games, Casual, Puzzle - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.0 · 57 MB - Languages: American English - Released: 2026-10-28 - Data updated: 2026-11-01 ## What is Koidoku? Draw one stream. Fill every tile. Set the koi free. Koidoku is a calm, clever path puzzle. Start at the spring and draw a single stream of water through every tile on the board, reaching the numbered stones in order. Each stone you reach releases a koi that leaps into your stream and swims along it. Simple to learn, hard to master. RAISE YOUR OWN KOI POND Every puzzle you solve earns food for your pond. Feed your koi and watch them grow, hatch eggs to discover rare varieties, and unlock lotus flowers, lanterns, a moon bridge, a waterfall and fireflies at night. Three new tasks every day keep your pond thriving. A NEW PUZZLE EVERY DAY One daily puzzle, the same for everyone. Keep your streak alive (streak freezes save you on busy days) and see how your time compares with friends and players around the world. PLAY WITH FRIENDS • Add friends with a 6-letter code and see who's fastest on today's puzzle • Koi League: start a league for your family, office or friends' group. Everyone plays the same 5 boards before the deadline, and the best total time wins • Koi Duel: race the same boards in your own time, best of 1, 3 or 5 • Challenge a friend to beat your time on any level FEATURES • 750 puzzles across Easy, Medium and Hard • 5 worlds to explore: Zen Garden, Frozen River, Desert Oasis, Coral Reef, Lantern Canal • 14 koi varieties to collect, from common Kohaku to the legendary Reef Visitor • Achievements and leaderboards with Game Center • Your progress saves to iCloud • Soothing water sounds and koi that really swim • No account or sign-up needed Koidoku is free to play with ads. You can remove ads forever with a single purchase. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove ads | $2.99 | one-time | ## Is Koidoku safe? Not enough ratings yet to assess Koidoku. ## Is Koidoku legit? Koidoku: Koi Water Puzzle has limited verification signals. The AppsHunter Legitimacy Score for Koidoku is 50 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 4 releases) ### 1.2.5 — 2026-10-31 Fixes a timer glitch that could show a wrong time after a phone call, plus small improvements. ### 1.2.4 — 2026-10-30 Send duels and challenges straight to your friends: they get a notification and can play right away. Add friends from any leaderboard, a new way to add friends by code, calm pond music on the home screens (tap the music button to turn it off), and fixes. ### 1.2.3 — 2026-10-29 New in this update: • Daily rankings: the world, your country, country vs country, and your friends • A graph of your daily rank for the week and month • Medals and a celebration when you reach the top 3 • Add your name to the boards • Friends get a notification when you finish the daily • Your name, friends and board places now move with you to a new phone • Faster results after every level ### 1.2.0 — 2026-10-29 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-01.*