# Sea Maps vs DirtGPS

The clearest difference is monetization model: DirtGPS at free with in-app purchases against Sea Maps's subscription. DirtGPS also leads on update cadence (every 9 days vs monthly) and iOS requirement (17.0 vs 26.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Sea Maps sells 3 in-app purchases, starting at $14.99 per 3 months and DirtGPS sells 4 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Sea Maps ships an update monthly, DirtGPS every 9 days. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Sea Maps | DirtGPS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sea-maps/id6584526029/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 106 MB | 39 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APP ASPIRES](https://appshunter.io/developer/1272065949) | [DIRTGPS PTY LTD](https://appshunter.io/developer/1894133591) |

## What reviewers say

### Sea Maps

[App page](https://appshunter.io/ios/app/sea-maps/id6584526029)

This marine navigation app provides boaters with interactive maps, real-time weather overlays, and AIS vessel tracking. It offers advanced features like bathymetry, anchor alarms, and track recording for safe and informed ocean exploration.

**Highlights:** Interactive marine charts, Real-time weather overlays, AIS vessel tracking, Anchor alarm system, Track recording, Bathymetry data

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months Subscription | $14.99 | per 3 months |
| 6 Month Subscription | $24.99 | per 6 months |
| 1 Year Subscription | $39.99 | per year |


### DirtGPS

[App page](https://appshunter.io/ios/app/dirtgps/id6762439322)

This app provides precise GPS navigation for off-road activities like racing and exploration. It offers real-time speed and position tracking, easy waypoint marking, and the ability to record and replay routes, all in a user-friendly interface designed for high-speed use.

**Highlights:** Real-time GPS with speed & heading, One-tap waypoint marking, Track recording and replay, Offline satellite maps, GPX import and export, Prerunner mode, 3D terrain with satellite imagery

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DirtGPS PRO Monthly | $12.99 | per month |
| DirtGPS PREMIUM Monthly | $29.99 | per month |
| DirtGPS PRO Yearly | $79.99 | per year |
| DirtGPS PREMIUM Yearly | $249.99 | per year |


## Frequently asked questions

### Is Sea Maps free?

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

### Is DirtGPS free?

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

### Do Sea Maps or DirtGPS have ads?

Neither Sea Maps nor DirtGPS shows ads.

### Which is updated more often, Sea Maps or DirtGPS?

Sea Maps ships an update monthly, and DirtGPS every 9 days. Most recently, Sea Maps was updated on November 4, 2026 and DirtGPS on November 6, 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.*