# SeaBase vs CHRTsail

The clearest difference is monetization model: CHRTsail at free against SeaBase's paid. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for SeaBase against 5.0 for CHRTsail. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

SeaBase ships an update every 6 days, CHRTsail weekly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SeaBase | CHRTsail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/seabase/id6786122931/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/chrtsail/id6791724705/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Paid | **Free** |
| Size | 80 MB | 50 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yeoman Ventures LLC](https://appshunter.io/developer/6785116999) | [CHRT Co.](https://appshunter.io/developer/6791724707) |

## What reviewers say

### SeaBase

[App page](https://appshunter.io/ios/app/seabase/id6786122931)

This offline-first sailing companion provides essential tools for life on the water. It includes an anchor alarm, nautical charts, GPS navigation, tide information, and a logbook, all functioning without a cellular signal. Enjoy a comprehensive suite of features with a single, one-time purchase.

**Highlights:** Offline nautical charts, Anchor alarm with drift detection, GPS navigation and route planning, Offline tide predictions, Harbor and anchorage finder, Auto-tracking logbook, Reference guides and emergency tools

**Features:** Apple Watch app

**In-app purchases:** none


### CHRTsail

[App page](https://appshunter.io/ios/app/chrtsail/id6791724705)

This app provides modern, vector-based nautical charts and navigation tools designed for today's mariner. It offers offline functionality, customizable chart displays, and real-time weather and tide information.

**Highlights:** Vector-based nautical charts, Offline navigation, Customizable chart rendering, Real-time weather and tides, Cross-platform account sync, Live Activity and widgets

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

**In-app purchases:** none


## Frequently asked questions

### Is SeaBase free?

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

### Is CHRTsail free?

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

### Which has better reviews, SeaBase or CHRTsail?

SeaBase and CHRTsail are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do SeaBase or CHRTsail have ads?

Neither SeaBase nor CHRTsail shows ads.

### Which is updated more often, SeaBase or CHRTsail?

SeaBase ships an update every 6 days, and CHRTsail weekly. Most recently, SeaBase was updated on October 31, 2026 and CHRTsail on November 5, 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.*