Fathom: Deep Sea Tycoon
Simulation
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
You start with one rusted barge in shallow water and a very long way down.
Tap a rig to run a production cycle. Buy levels to make each cycle pay more. Hire crew and the rig runs itself — forever. That is the whole first hour, and it goes quickly.
Then the water gets darker.
THE DESCENT Hand-authored depth bands, from the Sunlight Shallows down through the Twilight Verge, the Midnight Expanse, the Abyssal Plain, the Hadal Trench and the Ember Vents. Each has its own water, its own pressure, its own machines. Past the authored zones the trench keeps going — generated, but never random. Zone forty is as well-formed as zone one.
SALVAGE RUNS Send submersibles down and leave them. A twenty-second run pays once; a six-hour run pays three times as much. Longer runs bring back more alloy, more artifacts, and better odds on something living.
THE FIELD LOG Six species in every zone, from common to epic. Every one you catalogue keeps working for you permanently — income, alloy, potency — and keeps working across every resurface. Duplicates still help, with diminishing returns.
RESEARCH THAT STICKS Artifacts buy permanent upgrades. Pearls buy deeper ones. Nothing you research is ever taken back, no matter how many times you resurface and start the climb again.
BUILT TO RESPECT YOUR TIME • No ads. • No in-app purchases. • No premium currency. • No energy meters, no timers you have to pay to skip. • Offline earnings capped at 24 hours, not 12 — and that cap only ever goes up. • Plays fine with no connection.
GAME CENTER Four leaderboards and nine achievements, if you want them. Entirely optional — the game never makes you sign in.
Fathom is a finished game, not a service. Nothing is held back from you, and nothing asks for your wallet once you are in.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixes a problem reported by a player: once you bought the Automated Winch there was no way to change where your submersibles were going, or to stop them.
- Auto-relaunch now sends submersibles to the zone and duration you currently have selected, instead of endlessly repeating the run that was active when you bought the winch.
- Added an Auto-relaunch switch, so you can let runs finish without being immediately re-sent.
- Added Recall, which calls off a run that is still in the water and frees the bay straight away. The run brings nothing back, so it asks first.
- Your selected target zone and duration are now remembered between sessions.
- Leaderboards and achievements are live.
Existing saves carry over untouched.
The developer, Amir Ghaemi, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Amir Ghaemi
- Size
- 2.3 MB
- Category
- Simulation
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Amir Ghaemi
