Shape the skyline
Develop properties through visual stages and watch your city transform from day to night.
Black Thorn Labs presents
Coming to iPhoneWATCH.
BUILD.
COMPOUND.WBC
Turn small moments into a living tropical world. Earn virtual Points through optional rewarded videos, build and upgrade your island, collect marine life, and grow something bigger with your crew.
Current in-game capture from the iPhone build.
A world that
keeps growing.
A casual simulation, tropical city builder, and living aquarium collection game designed around short sessions and visible progress.
Meet the ocean
Discover marine animals, inspect them in 3D, breed fish and crustaceans, and expand your collection.
Keep building
Buildings and wildlife can generate virtual Points over time, giving you new ways to keep building.
Progress together
Invite friends, race toward a shared landmark, and unlock stronger shared progress.
Real captures.
Current build.
These are current 1320 by 2868 iPhone gameplay captures prepared for the 2026 App Store submission.
Your island city
Develop the city, claim virtual Point production, and move between day and night.
Your living aquarium
Collect wildlife and breed fish or crustaceans inside a responsive aquarium.
Interactive 3D wildlife
Inspect marine animals in 3D. Any rate shown is virtual Points per day.
Important: WBC is entertainment. All Points, Virtual Rent, production, rewards, items, boosts, and balances are virtual game values with no cash value. They cannot be withdrawn, redeemed, or converted to money. WBC does not provide investments, financial accounts, interest, or real-world returns.
Release status
Waiting for Review
WBC version 1.0, build 21, has been submitted to Apple for App Review. Release is manual. WBC is not available on the App Store until Apple approves it and the manual release is completed.
Player information
Clear choices
Rewarded videos and surveys are optional. Availability and rewards may vary. The private beta is not directed to children under 13.