PredictWind Race Tracker vs iSailGPS NZ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PredictWind Race Tracker
This app enables yacht race participants to send GPS tracking data for live viewing by spectators or event organizers. You can also set up personal tracking and share a link for friends to follow your progress in real-time. The app offers race replay functionality for strategy evaluation.
- Live GPS tracking for races
- Spectator viewing mode
- Personal tracking with shareable link
- Real-time progress updates
- Race replay for strategy analysis
- Safety monitoring for organizers
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The PredictWind Race Tracker App allows competitors to send GPS tracking data, or spectators to watch the yacht race. You can also setup your own personal tracking, and share a web link with friends to watch your progress in real time. Benefits • Friends can watch your progress in real time • Safety - so event organizers can monitor your progress • Replay the race - evaluate your race strategy! Please email us at support@predictwind.com to get your yacht race activated. For installation instructions please visit www.predictwind.com/tracker The data usage for the App is approximately 1 MB for a race day. Continued use of GPS running in the background can dramatically decrease battery life.
iSailGPS NZ
This app transforms your iPhone or iPad into a powerful GPS receiver for nautical navigation, even offline. It provides detailed nautical charts and tools for tracking, waypoint management, and route planning. Essential for safe return to port during emergencies.
- Offline LINZ RNC Nautical Charts
- GPS tracking and recording
- Waypoint and route creation
- Man Overboard (MOB) function
- Sun and moon position data
- GPX, KML, TCX file import/export
- Customizable units
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Unleash the navigation potential of your iPhone or iPad with SailGPS NZ! Turn your device into a high-performance GPS receiver with LINZ RNC Nautical Charts, even without a cell signal! Caught in a storm on the water and your chart plotter fails? Don't worry! Download this app now and regain navigation capabilities to safely return to port. Better yet, buy iSailGPS NZ today ensuring you're prepared for any situation, even in areas with no cell service. One Low Price! Everything included. No sign-ups, ads, subscriptions or in-app purchases. Completely respects your privacy. Unrivaled Features to Enhance Your Journey: TRACKS, WAYPOINTS & ROUTES Record tracks as you sail, even in the background. View them on the chart and in a Speed & Course Over Ground graph. Mark waypoints precisely using charts or satellite maps, place names or addresses, geotagged photos, or by projecting from a known point. Set a quick GoTo waypoint or a full route and see the course (COG), heading (HDG), bearing (BRG), direction, distance, cross track error (XTE), Velocity Made Good (VMG) and Estimated Time of Arrival (ETA) at your destination and intermediate points. Perfect for racing enthusiasts. In a Man Overboard (MOB) emergency a single button press marks your current position & starts navigating to it. Create customized routes using waypoints, recorded tracks, or imported GPX, KML or TCX files. Advanced route editing. Send GPX and KML waypoint, route, track and map list files via AirDrop, eMail, Messages or iCloud Drive. View the sun & moon position and rise & set times for any date and place on earth. Send data to other apps such as Google Earth. LAND INFORMATION NEW ZEALAND RNC MARINE CHARTS Access all LINZ NZ Raster Nautical Charts with no extra charge. These charts had their final update on 7/12/23. There will be no further updates. Our charts are optimized to download faster using WiFi or cell service. Store a few charts or charts for the whole country to use anytime without cell service. Stitches Mercator charts & automatically switches between downloaded charts as you sail. Choose detailed or overview charts. Enjoy the high resolution and what's-all-around detail of these NZ Nautical Charts (RNC). They are a welcome advantage over Vector Charts, which only show a coastline, depths, navigation aids, and minimal details. Print and Share chart images overlaid with waypoints, routes & tracks. Measure distance between any two points. USE YOUR PREFERRED UNITS Kilometers, Miles or Nautical Miles. Meters or Feet. Degrees, Degrees/Minutes, Degrees/Minutes/Seconds, UTM or NZTM2000 grid. °True or °Magnetic. HOW TOS Tap Help in the app. Online Manual: iSailGPS.com/nz Email developer: lwjames@isailgps.com RASTER CHARTS vs. VECTOR CHARTS The Land Information New Zealand Raster Nautical Charts in iSailGPS NZ differ from computer-drawn vector ENC charts in that each chart covers a specific area, the same way a paper nautical chart does. Switches automatically to a new chart when you leave the area covered by the previous chart. For many locations, there are multiple charts at different scales with different levels of detail & areas of coverage. Paper charts can contain multiple panels, each showing a different area or scale. Each digital panel is individually displayed by iSailGPS NZ with a north-up orientation. iSail GPS NZ is priced to make it readily available to all boating enthusiasts. iSailGPS NZ and the charts that it includes do NOT meet the legal requirements for navigation using charts that you may be required to carry. DEVICE REQUIREMENTS Use iSailGPS on any iOS device even if you don't have a cellular data plan for it. iPhones & WiFi+cellular iPads support all features. For WiFi-only iPads, an iOS-compatible external GPS receiver is required to show your location & record tracks. You can view charts using the iOS device alone. Discover a safer and more enjoyable sailing experience with iSailGPS NZ!
Screenshots
Verdict
The clearest difference is price: PredictWind Race Tracker at Free against iSailGPS NZ's $0.99. iSailGPS NZ's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.6). On review sentiment, update cadence, ads and device support 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
PredictWind Race Tracker is free to download; iSailGPS NZ costs $0.99 up front. PredictWind Race Tracker sells 2 one-off in-app purchases. iSailGPS NZ asks for nothing beyond the download.
PredictWind Race Tracker ships an update every 6 weeks, iSailGPS NZ monthly. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.
| Parameter | PredictWind Race Tracker | iSailGPS NZ |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 77.8% of reviews — better | 71.4% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | PredictWind Limited | James Associates Inc. |
Customer experience
PredictWind Race Tracker
iSailGPS NZ
In-app purchases
PredictWind Race Tracker
- Unlimited Tracking for 12 months$2.99
- Unlimited Tracking for 3 months$2.99
iSailGPS NZ
No in-app purchases
Questions
Is PredictWind Race Tracker free?
Is iSailGPS NZ free?
Do PredictWind Race Tracker or iSailGPS NZ have ads?
Which is updated more often, PredictWind Race Tracker or iSailGPS NZ?
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