# Sea Depth — Offshore Bathymetry Charts

> Professional-grade bathymetric charts for offshore navigation and fishing. (iPhone/iPad app by Seadepth Charst.)

- Source: https://appshunter.io/ios/app/sea-depth/id6747972372 (this page in markdown: same URL + `.md`)
- Developer: [Seadepth Charst](https://appshunter.io/developer/1823642107)
- Category: Navigation, Sports
- Price: Free with in-app purchases
- Rating: 3.00/5 from 4 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 105 MB
- Languages: American English
- Released: 2026-03-28
- Data updated: 2026-09-07
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sea-depth/id6747972372/reviews.md

## What is Sea Depth?

SeaDepth delivers professional-grade bathymetric charts for anglers looking to add a new level of detail and insight offshore.

Built using high-resolution survey data and advanced shaded-relief techniques, SeaDepth reveals underwater structure, contours, and terrain that traditional charts often fail to show. The result is a clearer, more intuitive view of the seafloor - helping anglers and captains better understand offshore environments before and during time on the water.

In addition to detailed depth visualization, SeaDepth offers optional data overlays, intelligent contour labeling, waypoint interoperability, and analytical tools that enhance situational awareness offshore.

Key Features

• High-resolution shaded-relief bathymetry
• Detailed, clearly labeled depth contours
• Intelligent contour interval scaling by depth range
• Pipeline overlay (Gulf of America)
• Bottom composition overlays highlighting seafloor characteristics
• GPX waypoint import and export for interoperability with other platforms
• Drift Test tool to observe drift direction and speed over time
• Offline chart access for use beyond cellular coverage
• Smooth zooming and panning optimized for offshore use

Depth Contours with Intelligent Labeling

SeaDepth uses a graduated contour labeling scheme designed to provide maximum detail where it matters most, while maintaining clarity and performance in deeper 
depths:

• 1-foot contour intervals from 1 to 500 feet
• 10-foot contour intervals from 500 to 2,500 feet
• 80-foot contour intervals from 2,500 feet to abyssal depths

This approach delivers high-resolution insight in shallow and mid-depth areas while avoiding visual clutter in deepwater environments.

Overlay Intelligence

SeaDepth allows users to enable optional overlay layers such as pipelines and bottom composition data in supported regions, including the Gulf of America. These overlays provide additional context and help users interpret bottom features and structural edges with greater confidence. All available overlay layers are included at no additional charge.

Waypoint Management (GPX Support)

SeaDepth supports importing and exporting waypoints using the GPX file format, making it easy to move data between SeaDepth and other compatible marine devices, charting software, or planning tools. This allows users to maintain consistent waypoint libraries across platforms.

SeaDrift-Drift Test Feature

The built-in Drift Test feature helps users evaluate drift behavior by tracking movement over time. This is especially useful when assessing current and wind influence to have more productive drifts. 

Built for Offshore Reliability

Charts, overlays, and waypoint data are stored locally on the device, allowing SeaDepth to function reliably offshore where connectivity may be limited or unavailable. Performance and usability are optimized for real-world offshore conditions.

Disclaimer

SeaDepth is intended as a supplemental planning and visualization tool only. It is not a substitute for official nautical charts, onboard navigation systems, or prudent seamanship.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- High-resolution shaded-relief bathymetry
- Detailed depth contours with intelligent labeling
- Optional data overlays (pipelines, bottom composition)
- GPX waypoint import/export
- Drift Test tool
- Offline chart access

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Charts Access | $99.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Cental GOA | $300.00 | one-time |
| Western GOA | $300.00 | one-time |
| Eastern GOA | $300.00 | one-time |
| Florida-West Coast | $300.00 | one-time |
| South Florida/Northern Bahamas | $300.00 | one-time |


## Chart rankings

- #196 in Top Grossing · Navigation (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/sea-depth/id6747972372/reviews.md

### 5/5 — Sea Depth is Incredible

*2026-04-01*

Sea Depth’s map for the western gulf is better than anything else I have used for our region. The colors used actually show the depth and bottom contour changes we are all looking for. Every rock, ledge and hole I have found on the map has lined up perfectly with what I actually see when on the boat and looking at my bottom machine. There are a lot of applications that do a few things right, but Sea Depth got it all right with this one. It even has a “drift test” function to help the googans out there get on top of the fish. Just click it, you won’t regret it.

## Frequently asked questions about Sea Depth

### What is Sea Depth?

Sea Depth provides professional-grade bathymetric charts with high-resolution shaded relief to help offshore anglers and captains understand underwater structure and terrain. It offers detailed depth visualization and optional data overlays for enhanced situational awareness.

### Does Sea Depth have ads?

No, Sea Depth is ad-free, allowing for an uninterrupted user experience while navigating or planning offshore.

### What are the subscription options for Sea Depth?

Sea Depth offers Premium Charts Access for $99.99 per year, which includes a 7-day free trial. This subscription unlocks advanced charting features and data.

### Can I use Sea Depth offline?

Yes, Sea Depth is designed for offshore reliability and allows for offline chart access. Charts, overlays, and waypoint data are stored locally on your device, ensuring functionality even where connectivity is limited.

### What devices is Sea Depth compatible with?

Sea Depth is available for iPhone and iPad devices. It is optimized for offshore use on these platforms.

### How does Sea Depth handle depth contour labeling?

Sea Depth uses a graduated contour labeling scheme with 1-foot intervals from 1 to 500 feet, 10-foot intervals from 500 to 2,500 feet, and 80-foot intervals for deeper areas. This provides maximum detail where needed without visual clutter.

### What is the age rating for Sea Depth?

Sea Depth has an age rating of 4+, making it suitable for a wide range of users interested in marine navigation and fishing.

### How often is Sea Depth updated?

The latest version of Sea Depth is 1.0.7, and it was last updated on May 26, 2026. This indicates regular updates to improve functionality and data.

## Version history (last 5 releases)

### 1.0.16 — 2026-08-28

Minor improvements and bug fixes

### 1.0.15 — 2026-08-27

New Florida-East Coast chart - from West Palm Beach to Fernandina Beach, with six bank zoom charts for Ft. Pierce, Cape Canaveral and Jacksonville.

### 1.0.14 — 2026-08-06

Minor improvements and bug fixes

### 1.0.13 — 2026-08-01

Minor improvements and bug fixes

### 1.0.12 — 2026-07-22

Minor improvements and bug fixes

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*