Best Depth Finder Ocean Apps & Games

248+ iOS apps & games curated and reviewed

4.3 avg rating

19 free apps & games

Updated September 2026

Finding the right depth finder ocean apps and games can be overwhelming with so many options. We've analyzed 248+ apps and games to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Depth Finder Ocean Apps & Games (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	How Deep?	Free	—	No	No	Sep 2026
2	WaveDepth: Water Depth	Free	—	No	No	Aug 2026
3	i-Boating: Marine Charts & Gps	Free	4.5★ (15K)	No	Yes	Oct 2026
4	Hawaii Ocean Map	$9.99	5.0★ (5)	No	No	Sep 2026
5	MarcoPolo Ocean	Free	4.5★ (254)	No	No	Aug 2026
6	Ocean Thread: Treasure Hunt	Free	4.9★ (70)	Yes	Yes	Sep 2026
7	Great Depths	Free	4.2★ (12)	No	Yes	May 2026
8	Fish Deeper - Fishing App	Free	4.5★ (652)	Yes	Yes	Sep 2026

Top Picks for Depth Finder Ocean

#1

How Deep? by Evergreen Labs

Tap to show water depth at sea

Editor's Choice

0.0(0 ratings)

Free

How Deep? screenshot 1

This app displays sea depth or land altitudes with a simple tap. It's ideal for travelers on cruises or hiking adventures, and can optionally track your journey.

#2

WaveDepth: Water Depth by Jin Hwa Lee

Find depth of sea from waves

Strong Contender

0.0(0 ratings)

Free

WaveDepth: Water Depth screenshot 1

WaveDepth: Water Depth screenshot 2

WaveDepth: Water Depth screenshot 3

WaveDepth: Water Depth screenshot 4

#3

i-Boating: Marine Charts & Gps by Bist LLC

Lake Depth Map,Sailing Plotter

Worth Considering

🗺️ Navigation

4.5😊(15K ratings)

FreeIn-App Purchases

i-Boating: Marine Charts & Gps screenshot 1

i-Boating: Marine Charts & Gps screenshot 2

i-Boating: Marine Charts & Gps screenshot 3

i-Boating: Marine Charts & Gps screenshot 4

i-Boating: Marine Charts & Gps screenshot 5

i-Boating: Marine Charts & Gps screenshot 6

Navigate waterways with detailed marine charts and GPS. Features include route planning, voice-guided navigation, tide and current predictions, and track recording. Offers extensive map coverage for various regions and inland rivers.

What We Love

🚀 Accurate GPS and navigation
🗺️ Detailed nautical charts
📊 Helpful fishing and structure information
🔍 Useful for finding unexplored fishing spots
💻 Offline functionality works well

Room to Improve

🌐 GPS/location issues, inaccurate positioning
💰 Expensive recurring subscription model
🔁 Difficulty restoring purchased content on new devices
🔧 Poor customer support and lack of response
📦 Missing coverage for some lakes/waterways

More Depth Finder Ocean apps to explore

Hawaii Ocean Map

Hawaii Ocean Map

Hawaii Ocean Map

Hawaiian Islands Depth Maps

Explore detailed seafloor topography of the Hawaiian Islands with professional-grade bathymetry data. Access maps offline, tap for instant depth queries, save locations, and navigate to waypoints. Ideal for marine activities with full island coverage and no subscriptions.

High-resolution bathymetry dataOffline map accessInstant depth queries

🗺️ Navigation

MarcoPolo Ocean

MarcoPolo Ocean

MarcoPolo Ocean

Build your own submarine!

Explore and build underwater worlds with this "digital sandbox" for kids. Discover marine life, construct submarines, and learn about ocean ecosystems through interactive play. Encourages self-directed learning in science and technology.

Build coral reefs and aquariumsExplore the deep seaSteer submarines and boats

Ocean Thread: Treasure Hunt

Ocean Thread: Treasure Hunt

Ocean Thread: Treasure Hunt

Tap through rings. Evolve sub.

Embark on a deep-sea submarine adventure, exploring the mysterious underwater world with stunning scenery. Navigate freely, avoid obstacles, and test your reflexes in a calm and relaxing journey. Discover the quiet joys of the ocean depths.

Deep-sea submarine explorationUnderwater world discoveryObstacle avoidance gameplay

free with in-app purchases

by Walk About Apps

This app transforms your iOS device into a digital depth finder. It provides comprehensive US coastal and Great Lakes coverage with live tide data and nautical charts. Navigate safely and efficiently with offline chart storage and distance calculation features.

Digital depth readoutsLive tide dataNOAA RNC nautical charts

🗺️ Navigation

free with in-app purchases

Fish Deeper - Fishing App

Fish Deeper - Fishing App

Fish Deeper - Fishing App

Lake Depth Maps to Catch More

This app provides detailed lake depth and bottom hardness maps to help anglers locate prime fishing spots. It also offers community features for sharing catches and tips, weather forecasts, and offline map access. Enhance your fishing experience with real-time sonar data when paired with compatible devices.

2D and 3D Depth MapsBottom Hardness MapsWaterbody Hub & Community

free with in-app purchases

Fishpop:deep ocean

Fishpop:deep ocean

Fishpop:deep ocean

by FUJIU LIMITED

A relaxing puzzle adventure where you match colorful sea creatures to clear the board. Explore hundreds of levels, build your dream ocean home with earned rewards, and enjoy a calm, pressure-free gaming experience.

Match colorful sea creaturesHundreds of puzzle levelsBuild and decorate ocean home

HawkEye DepthTrax PLUS

HawkEye DepthTrax PLUS

HawkEye DepthTrax PLUS

by NorCross Marine Products, Inc

This app turns your mobile device into a fish finder display for compatible HawkEye sonar products. It shows real-time sonar views, fish targets, bottom structure, depth, and water temperature, along with speed and heading data.

Live fish finder sonar viewIdentify fish targets and structureMonitor depth and water temperature

The MERMAID App

Access real-time data from autonomous oceanographic floats that record seismic activity. View instrument locations, trajectories, and health parameters. This app provides a low-cost method for oceanic data collection.

View MERMAID instrument locationsAccess recent trajectoriesObtain ocean depth information

Luckysmart Sonar

Luckysmart Sonar

Luckysmart Sonar

Fishing Points-Lake Depth Maps

Fishing Points-Lake Depth Maps

Fishing Points-Lake Depth Maps

Fish Finder,Gps Fishing Spots

This app provides detailed lake depth maps and marine charts with fishing points for various regions. It features an AI that identifies productive fishing spots based on bathymetry, local knowledge, and weather. Offers advanced GPS navigation with voice prompts, route planning, and tide/current predictions.

Fishing AI for spot predictionDetailed lake depth mapsMarine charts with fishing points

free with in-app purchases

Depth: Beneath the Waves!

Depth: Beneath the Waves!

Depth: Beneath the Waves!

by Pablo Galindo

🎬 Entertainment

Submarine Quest: Merge&Explore

Submarine Quest: Merge&Explore

Submarine Quest: Merge&Explore

Merge & Match Sea Life Puzzle

Embark on an underwater adventure to explore the ocean's depths. Match and merge sea life to unlock new content, discover rare species, and upgrade your submarine for deeper exploration. Uncover ancient secrets and customize your explorer.

Explore ocean depthsDiscover unique sea creaturesUpgrade and customize submarine

free with in-app purchases

Ocean Smash Fest

Ocean Smash Fest

Ocean Smash Fest

Dig Deep & Smash Rocks!

Pilot a high-tech submarine with a powerful saw to smash through ocean rocks and unearth valuable treasures. Upgrade your submarine's drill, cargo, and engines to delve deeper and collect more riches in this satisfying underwater mining adventure.

Pilot a high-tech submarineSmash through ocean rocksUnearth valuable treasures

Explore the depths

Explore the ocean world through an immersive game that trains AI for scientific research. Discover and identify over 50 groups of ocean animals using real imagery collected by researchers. Contribute to science while playing minigames, completing quests, and earning badges.

Play minigames with real ocean imageryIdentify over 50 groups of ocean animalsSave and share favorite images

Ocean Radar Expedition

Ocean Radar Expedition

Ocean Radar Expedition

by PIA MERETE HANSEN

HawkEye FishPod SONAR

HawkEye FishPod SONAR

HawkEye FishPod SONAR

by NorCross Marine Products, Inc

This smart fish finder app utilizes advanced sonar technology to help anglers locate fish. It offers unmatched versatility and usability, developed with decades of experience in marine electronics.

Smart fish finderAdvanced sonar technologyBoat mount compatible

🗺️ Navigation

FAQ about Depth Finder Ocean

Are there free depth finder ocean apps & games for iPhone?

Yes — 19 of the top depth finder ocean apps & games we rank are free to download, including How Deep? and WaveDepth: Water Depth.

Does How Deep? have ads or in-app purchases?

How Deep? has no ads and has no in-app purchases, according to its App Store listing as of September 2026.

How many depth finder ocean apps & games are on the App Store?

We track 248+ depth finder ocean apps & games on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.