SailWatcher vs SailScan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SailWatcher
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SailWatcher is the perfect app for all sailing and boating lovers. Whether you are an expert or a beginner enthusiast, this app will help you plan, monitor and live your adventures at sea to the fullest. Key features: - Track course and key points: While sailing, SailWatcher records the boat's GPS position and that of the points where the shots were taken to retrieve parameters - Practical and fast: To perform the analysis, simply take a shot, select the areas of interest and finally the LUFF. - Share: Once the parameters are calculated, you can share all the information, including the photo and personal notes, by generating a unique URL. - SailWatcher Engine: An algorithm has been developed that, requiring only a few pieces of information from the user, identifies and evaluates the sail's shape lines, returning draft, camber, twist, entry and exit angle. Thanks to an intuitive interface and advanced features, SailWatcher allows you to focus on what you love most: sailing. The app is designed to offer you all the information you need, right in the palm of your hand. Download SailWatcher today and take your passion for sailing to a higher level! --- FREQUENTLY ASKED QUESTIONS - Which parameters does it calculate? SailWatcher calculates the following parameters: camber, draft, twist angle, entry angle, exit angle. It also saves the boat's speed at the moment the photo is taken. - Does it work on every sail? SailWatcher calculates the parameters of all sails with highlighted shape lines. If your sails have visible shape lines, you can use SailWatcher. - Is an internet connection required? SailWatcher is designed to be used on the open sea; it does not require an internet connection, except for some secondary functions (e.g. sharing). - Can I share the obtained data? Yes, via a unique URL. The web page will contain the photo, the shape lines with their parameters, additional data (wind speed, ...) and additional notes entered by the user. - Why can't I retrieve the data? SailWatcher performs a series of calculations to identify shape lines. If you can't retrieve the data for your sail, let us know by email. We will analyze the case and improve the algorithm so that it also identifies your sail.
SailScan
This app uses your phone's camera to analyze sail shape by identifying draft stripes. It provides detailed measurements like camber, draft position, entry, exit, and twist for each stripe. You can also log environmental data and compare scans over time.
- Measures camber, draft, and twist
- Identifies draft stripes from photos
- Logs wind speed, angle, boat speed, heel, and GPS
- Compares tack-to-tack and day-to-day scans
- Generates shareable reports
- Exports data as CSV
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SailScan measures sail shape from a photo. Point your phone at the sail and it finds the draft stripes and gives you camber, draft position, entry, exit and twist for every stripe. The stripes are traced on the image so you can see exactly what was measured. Built on a vision model trained on real racing sails, with the most accurate stripe reading we have ever shipped. Log wind speed, wind angle, boat speed, heel and GPS with each scan. Save scans, compare tack to tack and day to day, share a report, export the CSV, or post to the SailScan feed. Mainsails and jibs. RC boats to super maxis and everything in between. A training tool. Check your class rules before using it while racing. Free. Open to everyone. sailscanapp.com
Screenshots
Verdict
SailWatcher and SailScan are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | SailWatcher | SailScan |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | — | Daily |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 16 | 15.1 — better |
| Further details — not scored | ||
| Size | 34 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Deploynk srl | Sail Scan LLC |
In-app purchases
SailWatcher
No in-app purchases
SailScan
No in-app purchases







