# CoordCalc vs Sea Depth

The clearest difference is review sentiment: Sea Depth at 100% against CoordCalc's 40%. Sea Depth also leads on price (Free vs $2.99) and rating (4.3 vs 3.0). CoordCalc's advantage is in-app purchases (none vs 10) and iOS requirement (9.0 vs 15.0). On ads and device support there is nothing between them.

Sea Depth is free to download; CoordCalc costs $2.99 up front. Sea Depth sells 10 in-app purchases, starting at $99.99 per year. CoordCalc asks for nothing beyond the download.

Sea Depth holds the better App Store score, 4.3 against 3.0. Both are backed by a comparable volume of ratings — 4 and 13 respectively. Written reviews point the same way: 40% of CoordCalc's written reviews are positive against 100% of Sea Depth's.

CoordCalc ships an update monthly, Sea Depth weekly. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | CoordCalc | Sea Depth |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/coordcalc/id308502516/reviews) | **[4.3 (13 ratings)](https://appshunter.io/ios/app/sea-depth/id6747972372/reviews)** |
| Number of ratings | 4 | **13** |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | — | **#190** |
| Size | 2 MB | 106 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Justin Time](https://appshunter.io/developer/308502519) | [Seadepth Charst](https://appshunter.io/developer/1823642107) |

## What reviewers say

### CoordCalc

[App page](https://appshunter.io/ios/app/coordcalc/id308502516)

Calculate distances and bearings between two points on Earth using manual coordinates or the built-in map. It can also determine a final position based on an initial point, distance, and bearing. Supports various units and coordinate formats.

**Highlights:** Calculate distance and bearing between two points, Determine final position from initial point, distance, and bearing, Manual coordinate input or map-based selection, Supports multiple distance units (miles, km, nautical miles, etc.), Converts between decimal degrees, minutes, and seconds, Uses GPS for current location, Saves previous positions

**Features:** macOS Compatibility

**In-app purchases:** none


### Sea Depth

[App page](https://appshunter.io/ios/app/sea-depth/id6747972372)

**Currently charting:** #190 Top Grossing · Navigation (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Charts Access | $99.99 | per year |
| Western GOA 50% | $150.00 | one-time |
| Eastern GOA 30% | $209.99 | one-time |
| Cental GOA 20% | $239.99 | one-time |
| Eastern GOA 20% | $239.99 | one-time |
| 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 |


## Frequently asked questions

### Is CoordCalc free?

CoordCalc costs $2.99, with no in-app purchases.

### Is Sea Depth free?

Sea Depth is free to download, with in-app purchases available.

### Which has better reviews, CoordCalc or Sea Depth?

Sea Depth is rated higher. CoordCalc averages 3.0 out of 5 from 4 ratings, while Sea Depth averages 4.3 from 13 ratings.

### Do CoordCalc or Sea Depth have ads?

Neither CoordCalc nor Sea Depth shows ads.

### Which is updated more often, CoordCalc or Sea Depth?

CoordCalc ships an update monthly, and Sea Depth weekly. Most recently, CoordCalc was updated on October 1, 2026 and Sea Depth on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*