Comparison

Sailchart vs RaceData2

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sailchart

This app provides GPS tracking for dinghy sailors to analyze race performance. It offers detailed insights into speed, heading, and course strategies, with live and post-race playback. Users can also track training sessions and create personal races for tuning exercises.

Highlights
  • GPS race tracking
  • Post-race performance analysis
  • Live and post-race playback
  • Personal race creation
  • Training session data display
  • Multi-race viewing
Read full description

Race Tracking and Performance Analysis for Dinghy Sailors. GPS tracking has become an invaluable tool for dinghy sailors, offering clear, data driven insights that were once impossible to capture on the water. With accurate speed, heading, and position information, Sailchart helps sailors analyse their performance in detail - improving course strategies and refining key skills like tacks and speed made good. The Sailchart app is used whilst sailing to collect data about the boat’s position, speed and course to provide both live and post-race playback of the race via the app or website and detailed analysis using the Sailchart website dashboard. Key Features of Sailchart include: • Comprehensive post-race analysis on the Sailchart website provides detailed comparison of key metrics including leg times, speed made good, tacking angles and speed loss over the tacks. • Charting of boat performance over time. • The race viewer can combine multiple races into one consolidated view, allowing spectators to view live racing for several races at the same time. • In addition to organised club races, users can create personal races for ad-hoc racing and tuning exercises. • Sailchart can also be used for training sessions where it displays live performance data like VMG and tack performance. Please note that you will need an access code from your sailing club to be able to register an account and track club or personal races. If your club has not enrolled with Sailchart then you can still track a training session.

About

RaceData2

This app transforms your iOS device into a sailing instrument display, showing real-time navigation and performance data from Expedition software. It offers customizable data pages, advanced graphs, and remote control capabilities for racing sailors.

Highlights
  • Real-time sailing data display
  • Customizable data pages and layouts
  • Advanced data graphs with trend analysis
  • Remote control of Expedition software
  • Apple Watch data display
  • Night mode and screen-always-on option
Features
Read full description

Transform your iPhone, iPad or Apple Watch device into a powerful sailing instrument display for Expedition Navigation Software and NMEA0183 data. RaceData2 (RD2) puts critical racing data at your fingertips, delivering real-time performance metrics from Expedition directly to your iOS phone or tablet via WiFi. Bonus is the bundled Apple Watch RaceData3 (RD3). Whether you're racing around the buoys or offshore, stay connected to navigation data with customisable, easy-to-read displays designed for racing. KEY FEATURES Real-Time Data Display - View any Expedition data channels including User and Alt channels with automatic name detection - Multiple data pages with swipe navigation - Customisable grid layouts and data colours - Live data status indicators show connection quality at a glance - Dark theme optimised for day and night sailing Advanced Data Graphs (Subscription) - Track performance trends with real-time graphs - Adjustable time windows: 1, 5, 10, or 30 minutes - Moving Average (MA) and Exponential Moving Average (EMA) trend lines - Visual shading between actual data and trends - Monitor multiple channels simultaneously Race Commands (Subscription only and not with NMEA0183, A+T, iDataNet) - Control Expedition from your device - Ping start line ends (Port/Starboard) - Ping new marks, and move the Active Mark to your bow/gps - Set up and create W/L race courses - Set race timer (1, 4, 5, 10 minutes or custom) - Sync timer to nearest minute - Kill race timer - Mark management - set W/L course, ping new or active mark, advance to next, or return to previous - Set Expedition Events - Emergency MOB (Man Overboard) broadcast - Command acknowledgement (requires Expedition 12.6+) Designed for Racing - Screen always-on option keeps data visible - Night mode - Use proximity sensor to turn screen off when iPhone is stowed - App pinning locks RD2 on screen - Data lock prevents accidental changes - Page lock maintains your preferred layout and allows fullscreen - Demo mode for testing setup without Expedition connection - Simple, clear RD2 watch app data pages Compatibility - Engineered to work with Expedition Navigation Software - Any system broadcasting Expedition format UDP data such as A+T Instruments - iDataNet for legacy systems - NMEA0183 UDP data - Works over standard WiFi networks Apple watch - Paired with your iPhone, receive and display all data. - With the RaceData3 Bridge PC application, your iPhone can request and receive Expedition data over WiFi. Leave your phone ashore. Visit https://www.fieldyachting.com/apps to download the Windows app. SUBSCRIPTION Free Features: - Display up to 4 channels (TWS, TWD, HDG, BSP) - Single 2x2 data page - Demo mode Subscription Features (Annual): - All Expedition channels - Multiple page layout options - Real-time data graphs with trend analysis - Command and MOB sending to Expedition PERFECT FOR: - Racing sailors who need navigation data away from the nav station - Crew members who need specific data for their position - Navigators wanting a wireless repeater display - Coaches monitoring performance from chase boats - Anyone using Expedition who wants mobile data access - Additional on deck or below data display - Add a waterproof case to your iOS device and have a new on-deck display REQUIREMENTS - iOS device on same WiFi network as Expedition computer - Expedition, iDataNet or NMEA0183 broadcasting UDP data on the network - Expedition configured to broadcast UDP data (RD2) and TCP data (RaceData2 Bridge Windows app) - iOS 16.6 or higher - watchOS 10.0 or higher SUPPORT Comprehensive user guide available at: https://www.fieldyachting.com/apps Developed by sailors, for sailors. RaceData2 is actively maintained by Field Yachting Ltd with regular updates based on user feedback from the racing community. View terms of use here: https://www.fieldyachting.com/app-store-terms-of-use

Screenshots

Sailchart4 screens
RaceData24 screens

Verdict

The call

The clearest difference is in-app purchases: Sailchart at none against RaceData2's 1. RaceData2's advantage is update cadence (every 6 days vs fortnightly). On price, rating, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RaceData2 sells 1 in-app purchase, starting at $69.99 per year. Sailchart asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Sailchart against 5.0 for RaceData2. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Sailchart ships an update fortnightly, RaceData2 every 6 days. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Sailchart versus RaceData2: the parameters behind the verdict, then further details
ParameterSailchartRaceData2
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
Update frequencyFortnightlyEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.6 — better16.6
Further details — not scored
Size41 MB7 MB
Age rating4+4+
DeveloperInformation Engineering Technology LtdField Yachting Ltd

Customer experience

Sailchart

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

RaceData2

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sailchart

No in-app purchases

1 purchases

RaceData2

Subscriptions1
  • RD2 Annual Subscription$69.991 Year

Questions

Is Sailchart free?
Sailchart is free to download, with no in-app purchases.
Is RaceData2 free?
RaceData2 is free to download, with in-app purchases available.
Which has better reviews, Sailchart or RaceData2?
Sailchart and RaceData2 are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Sailchart or RaceData2 have ads?
Neither Sailchart nor RaceData2 shows ads.
Which is updated more often, Sailchart or RaceData2?
Sailchart ships an update fortnightly, and RaceData2 every 6 days. Most recently, Sailchart was updated on October 14, 2026 and RaceData2 on October 2, 2026.

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