# Watt And Sea vs Doyle Guides

The clearest difference is review sentiment: Watt And Sea at 100% against Doyle Guides's 60%. Watt And Sea also leads on in-app purchases (none vs 10) and iOS requirement (14.0 vs 16.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Doyle Guides sells 10 in-app purchases, starting at $19.99 per month. Watt And Sea asks for nothing beyond the download.

Watt And Sea ships an update every 3 weeks, Doyle Guides every 5 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Watt And Sea | Doyle Guides |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (51 ratings)](https://appshunter.io/ios/app/doyle-guides/id6466621237/reviews)** |
| Number of ratings | — | **51** |
| Positive reviews | **100.0% of reviews** | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 52 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matthieu Michou](https://appshunter.io/developer/1465383699) | [Chris Doyle Publishing Limited](https://appshunter.io/developer/1707528206) |

## What reviewers say

### Watt And Sea

[App page](https://appshunter.io/ios/app/watt-and-sea/id1465383700)

Monitor your hydrogenerator's performance in real-time. Connect via Bluetooth to view current, voltage, and status. Record and share data logs, and access a knowledge base for troubleshooting.

**Highlights:** Real-time data monitoring (current, voltage, status), Bluetooth connectivity, Data logging and sharing, Access to knowledge database, Error status reporting

**Features:** macOS Compatibility

**In-app purchases:** none


### Doyle Guides

[App page](https://appshunter.io/ios/app/doyle-guides/id6466621237)

This app offers comprehensive sailing guides for the southern Caribbean, featuring nautical charts, service details, and points of interest. Users can search a large database, view results on an interactive map, and contribute comments or corrections.

**Highlights:** Comprehensive sailing guides, Nautical charts and navigational info, 3000+ points of interest database, Interactive satellite map, User comments and corrections, Island-specific content bundles

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| St. Vincent Sailing Guide | $19.99 | per month |
| Trinidad Tobago Sailing Guide | $19.99 | per year |
| Southern Leeward Sailing Guide | $24.99 | per month |
| Northern Leeward Sailing Guide | $24.99 | per month |
| Windward Islands Guide | $29.99 | per month |
| The Caribbean Pet - 1 month | $29.99 | per month |
| Windward Islands Guide | $39.99 | per year |
| Virgin Islands Cruising Guide | $39.99 | per year |
| Leeward Islands Sailing Guide | $39.99 | per month |
| Leeward Islands Sailing Guide | $59.99 | per year |


## Frequently asked questions

### Is Watt And Sea free?

Watt And Sea is free to download, with no in-app purchases.

### Is Doyle Guides free?

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

### Do Watt And Sea or Doyle Guides have ads?

Neither Watt And Sea nor Doyle Guides shows ads.

### Which is updated more often, Watt And Sea or Doyle Guides?

Watt And Sea ships an update every 3 weeks, and Doyle Guides every 5 weeks. Most recently, Watt And Sea was updated on November 3, 2026 and Doyle Guides on November 4, 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.*