# My Coast vs Marla Blue

The clearest difference is in-app purchases: My Coast at none against Marla Blue's 4. My Coast also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.4). Marla Blue's advantage is update cadence (every 3 days vs every 10 days) and review sentiment (100% vs 85%). On price, monetization model and device support there is nothing between them.

Both are free to download. Marla Blue sells 4 in-app purchases, starting at $9.99 per month. My Coast asks for nothing beyond the download.

My Coast ships an update every 10 days, Marla Blue every 3 days. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | My Coast | Marla Blue |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/marla-blue-diving-forecasts/id6673897108/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 85.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 20 MB | 94 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Flow Mobile Ltd](https://appshunter.io/developer/407317682) | [Ocean AI](https://appshunter.io/developer/1767770858) |

## What reviewers say

### My Coast

[App page](https://appshunter.io/ios/app/my-coast/id1623584098)

This app provides real-time coastal safety and information to help users make informed decisions before visiting the beach or entering the water. It offers details on tides, sea conditions, weather, and local facilities, tailored to specific activities and amenity needs.

**Highlights:** Live safety data, Tide and sea condition information, Weather forecasts, Local facilities and amenities, Activity-specific location filtering, Amenity-based location filtering

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

**In-app purchases:** none


### Marla Blue

[App page](https://appshunter.io/ios/app/marla-blue-diving-forecasts/id6673897108)

Plan your underwater adventures with detailed marine weather forecasts. Get AI-powered visibility predictions, swell, wind, tide, and temperature data for over 1500 dive spots worldwide. Receive algae bloom alerts and real-time reports from a community of local divers.

**Highlights:** Underwater visibility forecasts (AI & satellite), Swell, wind, tides, water temperature, Algae bloom alerts, Real-time viz reports & photos, 1500+ global dive spots, Community-driven insights

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marla Blue Monthly | $9.99 | per month |
| Dive Season Pass (6 months) | $34.99 | per 6 months |
| Annual | $44.99 | per year |
| Marla Annual Subscription | $59.99 | per year |


## Frequently asked questions

### Is My Coast free?

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

### Is Marla Blue free?

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

### Do My Coast or Marla Blue have ads?

Marla Blue shows ads; My Coast does not.

### Which is updated more often, My Coast or Marla Blue?

My Coast ships an update every 10 days, and Marla Blue every 3 days. Most recently, My Coast was updated on November 3, 2026 and Marla Blue on November 12, 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.*