MAJOR UPDATE
Where Pearls Paint the Sea
Board skins make their debut: solve puzzles to earn pearls, then use them to dress your board in fresh ocean colors.
FishDoku: No Ads Sudoku Game
Relaxing Fish Logic Puzzle
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Find your next aha moment beneath the waves. Enjoy 300+ free levels and a new puzzle every day. No ads, no videos to watch for hints. Just the joy of solving.
Logic puzzles without the ad breaks.
Place one fish in every row, column, and colored region. Keep fish apart, even diagonally, and solve each board through logic.
NO ADS. INCLUDING WHEN YOU USE HINTS.
No banner ads. No ads between puzzles. No videos to watch for hints. Both free and paid play are ad-free.
Start with over 300 free levels across Reef Trail and Quick Reef. Unlock the complete library of 20,000+ puzzles with one Full Ocean purchase. No subscription. Play puzzles offline; optional iCloud sync and Game Center require an internet connection.
Watercolor reefs, satisfying deductions, and a new daily challenge. Take your time and enjoy the next aha moment.
THREE SIMPLE RULES. PLENTY TO DISCOVER.
• Place exactly one fish in each row and each column.
• Place exactly one fish in each colored reef.
• Fish cannot touch, even diagonally.
Easy to learn, rewarding to figure out. Start with one sure move, connect the clues, and enjoy solving the whole board through logic rather than guesswork.
WHAT KIND OF BREAK ARE YOU IN THE MOOD FOR?
• Reef Trail: Follow a guided journey from friendly first steps to more intricate challenges.
• Quick Reef: Pick your board size and difficulty for a gentle warm-up or a serious brain workout.
• Daily Challenge: Take on a fresh 12 × 12 puzzle each day and make a little room for discovery.
TWO FISH. TAKE YOUR REASONING FURTHER.
Clues intertwine, and each discovery can open a new way forward. Two Fish brings richer layers of deduction: observe, rule out possibilities and connect the clues until everything clicks. A dedicated leaderboard and achievements celebrate each breakthrough.
YOUR LITTLE OCEAN, READY WHEN YOU ARE
A commute, a coffee break, a quiet moment before bed—there is always time for a few clues.
No account registration is needed. Play puzzles offline. Watercolor visuals, light and dark appearances, optional sounds and haptics, and a high-contrast board help you make the experience your own.
EXPLORE FOR FREE. STAY FOR THE OCEAN.
Enjoy over 300 free levels across Reef Trail and Quick Reef.
Want to explore further? One Full Ocean purchase unlocks the complete library of 20,000+ puzzles and future puzzle additions, an extra hint allowance per puzzle, and Auto Exclusion in every mode. No subscription. No ads.
YOUR OCEAN, ON iPHONE AND iPAD
Enjoy FishDoku on iPhone and iPad. When iCloud is available, your progress can sync through your private iCloud account. Puzzles remain playable offline; syncing requires an internet connection and iCloud.
Use optional Game Center to track regular puzzle progress and Daily Challenge streaks, and work toward dozens of achievements. The regular puzzle leaderboard counts distinct regular puzzles solved; Daily Challenge and repeat completions do not add to that total. Daily Challenge has a separate streak leaderboard. Full Ocean gives you access to more regular puzzles.
Turn Daily Challenge results and statistics into image cards to share, or send a FishDoku recommendation. Cards are created on your device and shared only when you choose.
A little challenge for your mind. A little ocean time for you.
Events
New Two Fish mode takes your reasoning a step further!
New Next assistance explains the logic to help you understand and make your next move.
A dedicated Two Fish leaderboard and 9 new achievements track your progress.
A refreshed home screen! New background music!
Fixed issues reported by players and improved the gameplay experience.
The developer, 纪洋 曾, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 纪洋 曾
- Size
- 324.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 19 more
- English, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Full Ocean $4.99
- Two Fish $2.99
- Ocean Treasury $9.99
- Deep Sea Collection $3.99
- Coral Gift $1.99
- Shore Pearls $0.99
- Copyright
- © 2026 JiYang Zeng
