BOISW vs Sail Scan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BOISW
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The official mobile app of the CRC Bay of Islands Sailing Week. This is the biggest regatta of its kind in New Zealand, and one of the Southern Hemisphere's premier yachting events, attracting entries from around New Zealand and overseas. The next edition of this much-loved event will take place from Tuesday 21 to Friday 24 January, 2020.
Sail Scan
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SailScan is currently in beta. SailScan turns your iPhone into a sail shape analyzer. SailScan's computer vision reads the trim stripes to measure what your eyes can't quantify. Measurements include: • CAMBER DEPTH — how much shape you're carrying, stripe by stripe • DRAFT POSITION — where the depth sits, front to back • TWIST — how the top opens relative to the boom SailScan works on mainsails and jibs, from small one-design boats to grand prix racers and superyachts. Make real-time adjustments, save your scans, build your library, and start connecting your rig settings to increase speed and progress on the water. WHY IT MATTERS Good trimmers develop an eye over decades. SailScan gives you the numbers behind that eye—so you can repeat fast settings, compare tack to tack, and debrief with data instead of memory. HOW IT WORKS 1. Photograph your sail (main or jib) from below 2. SailScan detects the stripes and calculates shape metrics 3. Review, adjust, and save your scans 4. Compare scans across the day—track every setting change BUILT BY SAILORS SailScan was built by people who race and trim for a living. Join us!
Screenshots
Verdict
The clearest difference is update cadence: Sail Scan at daily against BOISW's every 8 months. BOISW's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
BOISW ships an update every 8 months, Sail Scan daily. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.
| Parameter | BOISW | Sail Scan |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 83 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Yachting New Zealand | Nate McGuire |
In-app purchases
BOISW
No in-app purchases
Sail Scan
No in-app purchases








