Harbor Letters: Tide Routes
A little boat, a clever route
Free · In‑App Purchases
Collect island letters and sail home. Explore 72 routes, shifting tides and helpful lighthouses, with free hints and no timer. Your little post boat is ready.
Small islands. A boat full of letters.
Harbor Letters is a route puzzle about collecting every island's letter and returning to the post office. Tap connected islands to sail, and choose the order of your deliveries. A longer route still counts as a delivery; finding the shortest route is an optional stamp challenge.
72 routes across six regions
Sail from Paper Harbor to Windward Bay, Tideclock Cove, Lantern Cape, Faraway Post and Blue Archipelago. Learn one-way channels, three tide states, waiting, tide-changing lighthouses and express channels through short, playable lessons. Complete routes to collect six illustrated story postcards.
Take your time
Hints suggest a valid next move from your current position, and undo is always free. There are no lives or timers. Turn on Free exploration in Settings to choose any route without changing your earned progress.
Today's route
A daily route remixes a bundled chart using your device's local date. A voyage already in progress stays with you after midnight. There are no online rankings or login streaks to maintain.
A journey you can return to
The core game works offline and saves an unfinished voyage automatically. Keep a progress backup code to restore or merge completion records. Choose Korean, English or Japanese, larger text, reduced motion, sound and haptic preferences.
Ads and purchases
After the first 12 tutorial routes, an occasional interstitial may appear when you leave the results screen after completing several new routes. Ads do not interrupt a voyage or appear on the daily route. An optional one-time purchase removes all ads. Every route, hint and undo is free without purchase. Ads, purchases and restoration may require an internet connection.
No account or personal-letter entry is required. The letters and postcards are original fictional content. Keep a progress backup before deleting the app or changing devices.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A maintenance update with refreshed in-app version information. All 72 routes and your saved progress are preserved.
The developer, 위즈오션(WizOcean), 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:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- WizOcean
- Size
- 29.3 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Sail without ads $2.99
- Copyright
- © 2026 WizOcean