Trimm 420 vs Sail Trails
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trimm 420
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A rig trim simulation app for small sailing boats like the 420 class. Built in data is for the 420, but can be adapted for similar boats. You can use a note in the Notes app to hold text data for this app and then use copy and paste. Read on the website about the data format.
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.
Screenshots
Verdict
The clearest difference is update cadence: Sail Trails at every 5 months against Trimm 420's every 18 months. Trimm 420's advantage is iOS requirement (11.0 vs 13.1). 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.
Trimm 420 ships an update every 18 months, Sail Trails every 5 months. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.
| Parameter | Trimm 420 | Sail Trails |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 18 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.1 |
| Further details — not scored | ||
| Size | 20 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustav Schubert | Two* States* Away* |
In-app purchases
Trimm 420
No in-app purchases
Sail Trails
No in-app purchases
