# Race Sailing Tack Optimizer — Pro Edition > GPS-based sailing app for optimizing VMG and tacking on race courses. (iPhone/iPad app by Flemming Jensen.) - Source: https://appshunter.io/ios/app/race-sailing-tack-optimizer/id958773805 (this page in markdown: same URL + `.md`) - Developer: [Flemming Jensen](https://appshunter.io/developer/958773804) - Category: Sports, Navigation - Price: $0.99 - Age rating: 4+ - Requires: iOS 10.0 · 4 MB - Languages: American English - Released: 2015-01-28 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/race-sailing-tack-optimizer/id958773805/reviews.md ## What is Race Sailing Tack Optimizer? Race Sailing App to help you be the fastest boat on the race course. Mostly for up/down courses. This app is inspired by the RaceMaster TacTic compass and gives you similar information. The course over ground and speed is determined by GPS this way taking fx current into consideration. You can see if you are sailing the best vmg when tacking and when you sail downwind fx in light conditions you also optimize the vmg for getting down to the gate/bottom mark first :) The display changes color telling you which tack you are on. So green means you are on a starboard tack. This is only when you are using the app in vmg mode where you have set the course towards the top mark. Use the app to help you giving you some more information while sailing. Remember that finding the stronger wind and doing the right decisions is more important than looking at instruments. Happy racing - and remember to have fun doing so ..../) ## Key features - 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 ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/race-sailing-tack-optimizer/id958773805/reviews.md ### 4/5 — Works well, functional minimalistic GUI *2024-09-19, version 1.2.1* I am very happy with this very unique app. It took me some time to figure out how it works but find it very useful for sailing or in my case kitesurfing! I am glad the developer shares this tool with everybody. ### 1/5 — I think this could be useful..... *2019-09-13* But it isn’t intuitive and has no instructions so I can’t work out how to use it. **Developer response:** Version 1.2.0 now has quick help for better understanding how to interact with the app! Plus some other features and fixes :) The app is used for sailing Up/down regattas. So set the slider to the angle in degrees for the top mark. The app will calculate if you are on the right tack or not. Otherwise send me an email and I will try and help you at fj@dahlhof.com ### 1/5 — Worst App *2016-08-27* This would have to be the most useless and unfriendly App I have ever purchased.? No instructions and it does not do what it claims! **Developer response:** The app should we self intuitive to use - but please send me an email on fj@dahlhof.com and I will try and help you ### 1/5 — Does not work at all! *2016-08-10, version 1.0.9* plus: access to menu not possible! ## Frequently asked questions about Race Sailing Tack Optimizer ### What is the main purpose of Race Sailing Tack Optimizer? Race Sailing Tack Optimizer helps sailors improve their performance on up/down race courses by providing GPS-based calculations for speed and course over ground. It aims to help you sail the best VMG (Velocity Made Good) to reach marks first. ### How does Race Sailing Tack Optimizer use GPS? The app utilizes GPS to determine your course over ground and speed, taking into account factors like current. This data is crucial for calculating optimal VMG and providing real-time feedback. ### Does Race Sailing Tack Optimizer work on all devices? Race Sailing Tack Optimizer is available for iPhone and iPad. It is designed to be compatible with these Apple devices. ### What is the price of Race Sailing Tack Optimizer? Race Sailing Tack Optimizer is a paid application, priced at $0.99. This one-time purchase grants you access to its features. ### How often is Race Sailing Tack Optimizer updated? The app was last updated on January 16, 2020, with version 1.2.1. While the last update was in 2020, users can still benefit from its core functionality. ### What age rating does Race Sailing Tack Optimizer have? Race Sailing Tack Optimizer has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals. ### Does Race Sailing Tack Optimizer have ads? No, Race Sailing Tack Optimizer does not contain advertisements. As a paid app, it offers an ad-free experience for users. ### What tacking information does the app provide? The app features a display that changes color to indicate which tack you are on. For example, green signifies a starboard tack, providing a clear visual cue during racing. ## Version history (last 5 releases) ### 1.2.1 — 2020-01-16 Updated graphics ### 1.2.0 — 2019-12-17 Change display mode button Plus/minus angle adjustment buttons Quick help feature Font scaling fix Framework components updated ### 1.1.8 — 2019-12-14 Framework components updated ### 1.1.3 — 2017-11-27 Fixes missing colors in VMG mode Layout update for large devices eg iPhone X ### 1.1.1 — 2017-01-03 Nightmode added General size optimization ## Apps similar to Race Sailing Tack Optimizer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Boating Suite](https://appshunter.io/ios/app/boating-suite/id1501874071) | 3.5 (19) | Free | Sports | | [Sailboat Racing Signals](https://appshunter.io/ios/app/sailboat-racing-signals/id6474488492) | 5.0 (2) | Free | Sports | | [iRegatta Pro](https://appshunter.io/ios/app/iregatta-pro/id334632033) | 4.1 (8) | $19.99 | Sports | | [iRegatta](https://appshunter.io/ios/app/iregatta/id495549814) | 2.0 (4) | Free | Sports | | [Sailing timer tactical](https://appshunter.io/ios/app/sailing-timer-tactical/id1592526758) | 3.8 (6) | Free | Sports | | [YachtBot Sailing Tracker](https://appshunter.io/ios/app/yachtbot-sailing-tracker/id580705223) | 5.0 (1) | Free | Sports | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*