# Harry's Sailor vs Race Sailing Tack Optimizer

The clearest difference is review sentiment: Harry's Sailor at 70% against Race Sailing Tack Optimizer's 25%. Race Sailing Tack Optimizer's advantage is in-app purchases (none vs 1) and price ($0.99 vs $2.99). On update cadence, ads, monetization model and device support there is nothing between them.

Harry's Sailor costs $2.99 and Race Sailing Tack Optimizer $0.99 up front. Harry's Sailor sells 1 one-off in-app purchase. Race Sailing Tack Optimizer asks for nothing beyond the download.

Harry's Sailor ships an update every 4 months, Race Sailing Tack Optimizer every 2 months. The most recent releases landed on October 31, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Harry's Sailor | Race Sailing Tack Optimizer |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/harrys-sailor/id319244049/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **70.0% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 40 MB | 11 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Harald Schlangmann](https://appshunter.io/developer/307688601) | [Flemming Jensen](https://appshunter.io/developer/958773804) |

## What reviewers say

### Harry's Sailor

[App page](https://appshunter.io/ios/app/harrys-sailor/id319244049)

This GPS-based navigation tool assists sailors with advanced features like heeling visualization and alarms, racing rule guidance, and full navigation support. It offers detailed nautical information and a trip recorder with Google Earth export.

**Highlights:** Heeling visualization and alarm, Racing rule #10 display, Full navigation support (polar, waypoints, course), Google Maps integration, Deviation from course and VMG display, Nautical information reference, Trip recorder with Google Earth export

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Satellites Feature | $0.99 | one-time |


### Race Sailing Tack Optimizer

[App page](https://appshunter.io/ios/app/race-sailing-tack-optimizer/id958773805)

Optimize your sailing performance on up/down courses. This app uses GPS to calculate your course over ground and speed, factoring in conditions like current. It provides visual cues for your tack and helps you sail the best VMG to reach marks faster.

**Highlights:** GPS-based course and speed calculation, Optimizes VMG for upwind and downwind sailing, Visual tack indicator (color-coded), Considers current and wind conditions, Inspired by RaceMaster TacTic compass

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

**In-app purchases:** none


## Frequently asked questions

### Is Harry's Sailor free?

Harry's Sailor costs $2.99, and also offers in-app purchases.

### Is Race Sailing Tack Optimizer free?

Race Sailing Tack Optimizer costs $0.99, with no in-app purchases.

### Do Harry's Sailor or Race Sailing Tack Optimizer have ads?

Neither Harry's Sailor nor Race Sailing Tack Optimizer shows ads.

### Which is updated more often, Harry's Sailor or Race Sailing Tack Optimizer?

Harry's Sailor ships an update every 4 months, and Race Sailing Tack Optimizer every 2 months. Most recently, Harry's Sailor was updated on October 31, 2026 and Race Sailing Tack Optimizer on October 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.*