# SeaSat vs Sea Depth

The clearest difference is review sentiment: Sea Depth at 100% against SeaSat's 0%. Sea Depth also leads on rating (4.4 vs 1.0) and update cadence (every 5 days vs every 8 months). SeaSat's advantage is in-app purchases (none vs 10) and iOS requirement (8.0 vs 15.0). On price, ads and device support there is nothing between them.

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

Sea Depth holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Sea Depth has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of SeaSat's written reviews are positive against 100% of Sea Depth's.

SeaSat ships an update every 8 months, Sea Depth every 5 days. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | SeaSat | Sea Depth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/seasat/id932441902/reviews) | **[4.4 (14 ratings)](https://appshunter.io/ios/app/sea-depth/id6747972372/reviews)** |
| Number of ratings | 2 | **14** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 106 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Proambiente SCRL](https://appshunter.io/developer/932441901) | [Seadepth Charts, LLC](https://appshunter.io/developer/1823642107) |

## What reviewers say

### SeaSat

[App page](https://appshunter.io/ios/app/seasat/id932441902)

Access near real-time data on Sea Surface Temperature, water transparency, and chlorophyll concentration directly on your smartphone. This application provides essential environmental information for users interested in marine conditions.

**Highlights:** Sea Surface Temperature data, Water transparency information, Chlorophyll concentration readings, Near real-time updates, Smartphone accessibility

**In-app purchases:** none


### Sea Depth

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

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 SeaSat free?

SeaSat is free to download, with no in-app purchases.

### Is Sea Depth free?

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

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

Sea Depth is rated higher. SeaSat averages 1.0 out of 5 from 2 ratings, while Sea Depth averages 4.4 from 14 ratings.

### Do SeaSat or Sea Depth have ads?

Neither SeaSat nor Sea Depth shows ads.

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

SeaSat ships an update every 8 months, and Sea Depth every 5 days. Most recently, SeaSat was updated on October 11, 2026 and Sea Depth on October 18, 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.*