Comparison

Trimm 420 vs MEZZO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Trimm 420

420 rig trim simulation app.

About

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.

About

MEZZO

Features

Read full description

TBB's MEZZO is a digital switch and intellient electrical system for motorhome, camper van and trailer. So this mobile allows you to: 1) Monitor how master power and other power module like TBB's inverter (if there is) is working 2) Monitor water tanks status 3) Monitor lithium battery (If it's TBB's M series) 4) Control system or DC loads remotely It's a useful tool to help you manage and monitor electrical system on your RV. Enjoy your fun with it.

Screenshots

Trimm 4201 screens

MEZZO4 screens

Verdict

The call

The clearest difference is update cadence: MEZZO at every 2 months against Trimm 420's every 18 months. Trimm 420's advantage is iOS requirement (11.0 vs 13.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Trimm 420 ships an update every 18 months, MEZZO every 2 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 4 level

Trimm 420 versus MEZZO: the parameters behind the verdict, then further details
Parameter	Trimm 420	MEZZO
Price	Free	Free
Update frequency	Every 18 months	Every 2 months — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	11.0 — better	13.0
Further details — not scored
Size	20 MB	26 MB
Age rating	4+	4+
Developer	Gustav Schubert	TBB Power Co., Ltd

In-app purchases

None

Trimm 420

No in-app purchases

None

MEZZO

No in-app purchases

Questions

Is Trimm 420 free?

Trimm 420 is free to download, with no in-app purchases.

Is MEZZO free?

MEZZO is free to download, with no in-app purchases.

Do Trimm 420 or MEZZO have ads?

Neither Trimm 420 nor MEZZO shows ads.

Which is updated more often, Trimm 420 or MEZZO?

Trimm 420 ships an update every 18 months, and MEZZO every 2 months. Most recently, Trimm 420 was updated on October 17, 2026 and MEZZO on October 7, 2026.