Comparison

GPS VTS2 vs Sea Depth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GPS VTS2

Features
Read full description

It's an application that allows you to track your vehicles in real time if they have been installed with a Foneology GPS tracker on our VTS2 Platform. Features: Location of the vehicle in real time Tracking in real time Track Replay GPS VTS2 App Version: 1.0

About

Sea Depth

Visualize detailed underwater terrain with high-resolution bathymetric charts. Gain deeper insights into seafloor structure, contours, and terrain for offshore activities. Includes optional data overlays and waypoint management for enhanced situational awareness.

Highlights
  • 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
Features
Read full description

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/

Screenshots

GPS VTS23 screens
Sea Depth4 screens

Verdict

The call

The clearest difference is in-app purchases: GPS VTS2 at none against Sea Depth's 10. Sea Depth's advantage is update cadence (weekly vs every 38 months) and chart position (#192 vs unranked). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sea Depth sells 10 in-app purchases, starting at $99.99 per year. GPS VTS2 asks for nothing beyond the download.

UpkeepUpdate frequency

GPS VTS2 ships an update every 38 months, Sea Depth weekly. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

Scorecard4 real differences · 7 level
GPS VTS2 versus Sea Depth: the parameters behind the verdict, then further details
ParameterGPS VTS2Sea Depth
PriceFreeFree
Rating—3.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 38 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
Best chart rank—#192 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size155 MB105 MB
Age rating4+4+
DeveloperFoneologySeadepth Charst

In-app purchases

None

GPS VTS2

No in-app purchases

10 purchases

Sea Depth

Subscriptions1
  • Premium Charts Access7 Days trial$99.991 Year
One-time9
  • Western GOA 50%$150.00
  • Eastern GOA 30%$209.99
  • Cental GOA 20%$239.99
Show 6 more
  • Eastern GOA 20%$239.99
  • Cental GOA$300.00
  • Western GOA$300.00
  • Eastern GOA$300.00
  • Florida-West Coast$300.00
  • South Florida/Northern Bahamas$300.00

Questions

Is GPS VTS2 free?
GPS VTS2 is free to download, with no in-app purchases.
Is Sea Depth free?
Sea Depth is free to download, with in-app purchases available.
Do GPS VTS2 or Sea Depth have ads?
Neither GPS VTS2 nor Sea Depth shows ads.
Which is updated more often, GPS VTS2 or Sea Depth?
GPS VTS2 ships an update every 38 months, and Sea Depth weekly. Most recently, GPS VTS2 was updated on September 19, 2026 and Sea Depth on September 14, 2026.

Other comparisons