Great Depths is now completely FREE. Simply use the free two chart package to download as many free charts as you like.


Turn your iOS device into a digital depth finder. Great Depths offers coverage of the entire US coast, the Great Lakes, Lake Champlain and more... Know exactly where you are on the water and cruise to your port of call directly and safely. Sail with Great Depths for iPhone and iPad.

Great Depths offers digital depth readouts, live tide data and NOAA RNC nautical charts in 60 bargain-priced packages. Digital depth readouts are automatically adjusted based on current tide/lake level and are updated as you move or viewed anywhere with the touch of a finger.

-- The handy mileage menu calculates distance between any two points instantly.
-- Purchases are automatically synced across all your iOS devices and downloaded packages are stored locally on your devices so you don’t have to rely on cell service.
-- Best of all, Great Depths is FREE and never has adds! You can download the app and preview the available charts packages without spending a dime.

Chart coverage includes the entire coast of the contiguous USA, the Great Lakes, Lake Champlain, the Erie, Oswego and Champlain Canals, Lake Mead, Lake Oswego, Lake Pend Oreille, Lake Okeechobee, Lake Winnebago, Franklin D. Roosevelt Lake, Lake Cayuga, Lake Seneca Lakes, Wake Island and more....

What’s New

Version 4.0

This app has been updated by Apple to use the latest Apple signing certificate.

- Updates for iOS 11
- Bug fixes

Ratings and Reviews

4.1 out of 5
11 Ratings

11 Ratings

BernieforPres ,


Works for me . Good app. Helpful for boating . How do I get the dropped pin off the map? Maybe make a faq page for the app, for easier use

Lickmybuttholeplease ,

Map automatically switches 😤

The map always automatically loads to a picture map. It is very irritating and I would love to just keep the satellite map on while I browse the ocean depths. Is there any way to just keep the satellite map on without it automatically switching?

Quinny75 ,

Great app!!

We were visiting Lake Champlain for the week and had a paper chart but our chart plotter didn't cover this area. Got this app while exploring the lake and it was a tremendous help when cruising along!

App Privacy

The developer, Walk About Apps, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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