Best Bathymetry Apps

202+ iOS apps curated and reviewed

4.2 avg rating
19 free apps
Updated June 2026

Navionics® Boating is the household name in bathymetry, but it's far from the only option. We track 202+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Bathymetry

Navionics® Boating#1

Navionics® Boating by Garmin International

Nautical and fishing charts
Editor's Choice
🗺️ Navigation
2.9😞(2.3K ratings)
FreeAdsIn-App Purchases
#3in Navigation
Navionics® Boating screenshot 1
Navionics® Boating screenshot 2
Navionics® Boating screenshot 3
Navionics® Boating screenshot 4
Navionics® Boating screenshot 5
Navionics® Boating screenshot 6

Experience detailed nautical and fishing charts on your mobile device with offline access and a range of features through this must-have Boating app. Get expertly detailed charts for cruising, fishing, sailing, and diving – perfect for all your water activities. Try it free for a limited time and unlock advanced features with a yearly subscription.

What We Love

  • 🚀 Great navigation app
  • 🗺️ Detailed charts and maps
  • ⚓ Useful for boating and sailing
  • 💰 Good value for money

Room to Improve

  • 🐛 Frequent crashes and bugs
  • 🔒 Login issues and unreliable offline access
  • 💰 Expensive subscription model
i-Boating: Marine Charts & Gps#2

i-Boating: Marine Charts & Gps by Bist LLC

Lake Maps & Fishing Spots
Strong Contender
🗺️ Navigation
4.5😊(14K ratings)
FreeIn-App Purchases
#64in Navigation
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

Discover a comprehensive marine navigation app with detailed charts, precise route planning, and real-time AIS tracking. Navigate ocean waters effortlessly and ensure safe voyages with this essential tool for all boating enthusiasts. Explore and download the app to set sail confidently today!

What We Love

  • 🚀 Accurate GPS and navigation
  • 🗺️ Detailed nautical charts
  • 📊 Helpful fishing and structure information
  • 🔍 Useful for finding unexplored fishing spots

Room to Improve

  • 🌐 GPS/location issues, inaccurate positioning
  • 💰 Expensive recurring subscription model
  • 🔁 Difficulty restoring purchased content on new devices

More Bathymetry apps to explore

4
Fishing Maps by Fish Fathom
Fishing Maps by Fish Fathom
Fishing Maps by Fish Fathom
Coastal & Great Lakes Chart HD
Free

Explore high-definition coastal charts with detailed marine bathymetry data using our app. Plan your fishing trips, navigate waterways, and discover underwater terrain effortlessly. Download now for an immersive aquatic experience!

🗺️ Navigation
(14)
5
FishTrack - Charts & Forecasts
FishTrack - Charts & Forecasts
FishTrack - Charts & Forecasts
SST, tides, currents, & maps
Free

Track and analyze fishing activity with real-time data and weather conditions. Plan your fishing trips efficiently and improve catch rates. Get FishTrack now to enhance your fishing experience!

☀️ Weather
(6K)
6
Aqua Map Boating
Aqua Map Boating
Aqua Map Boating
Marine navigation and fishing
Free

Explore marine navigation, fishing, and weather with advanced features like offline charts, live tracking, route planning, and connectivity for AIS and GPS data. Start your 14-day free trial now for an enhanced boating experience.

🗺️ Navigation
(13K)
7
Fish Deeper - Fishing App
Fish Deeper - Fishing App
Fish Deeper - Fishing App
Lake Depth Maps to Catch More
Free

Explore water, find spots, and enhance your fishing trips with this modern fishing app. Access detailed lake depth maps, track fishing spots and catches, analyze sonar data, and synchronize your data across all platforms. Take your fishing experience to the next level now!

⚽ Sports
(653)
8
RipCharts
RipCharts
RipCharts
by RipCharts
Free

Access cutting-edge satellite fishing maps with the mobile app designed for offshore fishermen. Evaluate real-time satellite imagery, access various datasets, overlay data layers, and use mapping tools to pinpoint fishing hotspots. Download now to enhance your fishing experience.

⚽ Sports
(456)
9
Elevato
Elevato
Elevato
Global elevation map tool
Free

Get an instant elevation reading and explore global terrain with accurate data, including seabed depth and polar ice height. Use the app's powerful tools to save favorite spots, calculate long-distance visibility, and track your highest altitude achievements.

🔧 Utilities
(2)
10
Njord Pilot mobile
Njord Pilot mobile
Njord Pilot mobile
Easy to install and use
Free
🗺️ Navigation
(0)
11
Scuba Diving Computer Oceanic+
Scuba Diving Computer Oceanic+
Scuba Diving Computer Oceanic+
Snorkel & Dive Log Tracker
Free

Enhance your diving experience with a personalized dive computer for your Apple Watch Ultra. Dive smarter and explore the underwater world with advanced technology designed for scuba diving, snorkeling, and freediving. Experience the ultimate underwater adventure with just a tap of your wrist.

⚽ Sports
(4.3K)
12
HTH™ | Test to Swim™
HTH™ | Test to Swim™
HTH™ | Test to Swim™
Pool & Spa Water Testing
Free

Test to Swim™ is a pool water analysis app that helps users maintain safe and clean swimming pools by providing instant test results and personalized recommendations for water treatment. Dive in for hassle-free pool maintenance!

🔧 Utilities
(108)
13
FROG Water Care
FROG Water Care
FROG Water Care
by King Technology Inc.
Free
🌟 Lifestyle
(4.7K)
14
SeaView Mobile
SeaView Mobile
SeaView Mobile
Discover the Power of SeaView!
Free
☀️ Weather
(0)
15
DigiQuatics
DigiQuatics
DigiQuatics
Manage Pools, Not Paper!
Free

The detailed application description suggests a comprehensive pool management solution that streamlines various administrative tasks for commercial swimming pool operators, such as staff scheduling, chemical records, maintenance tracking, and member management. The application aims to help pool managers transition from paper-based processes to a digital platform, allowing them to efficiently manage all aspects of their facility operations.

💼 Business
(37)
16
Pool Math by TroubleFreePool
Pool Math by TroubleFreePool
Pool Math by TroubleFreePool
Easy pool care and maintenance
Free

An application for pool care and maintenance helps users easily manage and track their swimming pool's chlorine, pH, and other levels to determine the right chemicals to add for crystal clear water. Features include calculators, maintenance tracking, weather conditions, and a bleach price calculator. Premium subscribers gain access to additional features like unlimited test log history storage and maintenance reminders.

🔧 Utilities
(272)
17
KnowWake
KnowWake
KnowWake
Friendly Waterway Navigation
Free

Discover a FREE marine navigation platform with abundant waterfront destinations worldwide including restaurants, marinas, fuel docks, and more. Plan your boating adventures with ease using KnowWake!

🗺️ Navigation
(250)
18
DONIA
DONIA
DONIA
Navigate, Anchor and Protect
Free

This marine navigation application helps users protect the Mediterranean seabed by providing precise visualizations of the seabed, useful trip information, and safe anchorage booking. By joining a community of enthusiasts, users can share observations, navigate safely, and contribute to preserving marine ecosystems.

🗺️ Navigation
(28)
19
Hawaii Ocean Map
Hawaii Ocean Map
Hawaii Ocean Map
Hawaiian Islands Depth Maps
$9.99
🗺️ Navigation
(3)
20
Pooli
Pooli
Pooli
Smart Pool & Spa Care
Free

"Transform into a pool care expert with our user-friendly app. Access features like smart testing, interactive CSI tools, and tailored reports for safe and clean swimming experiences. Start your pool care journey now!"

🔧 Utilities
(361)