Sail Trails vs Boat Units
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sail Trails
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- Routes show when it's storm season and when it is the best time to go. - Port data shows monthly rain and Max/Min temperature averages. - View tracks and wind speed of tropical storms that occurred between 2000-2020. - Wind climatology show average wind per month collected from sattelite data. Also view pilot data collected from on-site observation from 1850-1970. - Layers allow you to see Sattelite Imagery, Bathymetry, AIS Density, Time Zones, Lightning Strikes, and Population Density maps.
Boat Units
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Boat Units gives sailors quick, reliable access to the conversions they use every day — from speed and distance to electrical, environmental, and onboard measurements. Designed for cruising sailors who want fast answers without digging through menus. Whether you’re checking wind speed, converting nautical miles, or working out electrical loads, everything is laid out for quick reference on the water. FEATURES Conversions tailored for sailors and yacht owners Nautical, environmental, electrical, length, and distance units Clean, simple interface built for quick use underway No ads, no clutter, no unnecessary categories DEVELOPMENT Boat Units is under active development, with new conversions and improvements planned. Feedback from sailors is always welcome and helps shape future releases.
Screenshots
Verdict
The clearest difference is update cadence: Boat Units at every 3 days against Sail Trails's every 5 months. Sail Trails's advantage is iOS requirement (13.1 vs 18.6). 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.
Sail Trails ships an update every 5 months, Boat Units every 3 days. Both last shipped on November 7, 2026.
| Parameter | Sail Trails | Boat Units |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 75 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Two* States* Away* | Marcus Johansson |
In-app purchases
Sail Trails
No in-app purchases
Boat Units
No in-app purchases
