Trimm 420 vs Bluemax
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.
Bluemax
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The BlueMax USA app is designed to work with their range of dynamometers in a range of utility applications.
Screenshots
Verdict
The clearest difference is update cadence: Bluemax at every 4 months against Trimm 420's every 18 months. Trimm 420's advantage is iOS requirement (11.0 vs 16.6). 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.
Trimm 420 ships an update every 18 months, Bluemax every 4 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.
| Parameter | Trimm 420 | Bluemax |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 18 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 20 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustav Schubert | Cyclops Marine Ltd |
In-app purchases
Trimm 420
No in-app purchases
Bluemax
No in-app purchases
