Trimm 420 vs Geometry Calculator
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.
Geometry Calculator
Perform a wide range of geometric calculations for various shapes including triangles, rectangles, circles, and prisms. Features an intuitive interface with instant recalculations and interactive visualizations. Customize units and decimal places for precise results.
- Calculate angles, sides, perimeter, and area
- Supports triangles, rectangles, circles, spheres, cones, trapezoids, parallelograms, cylinders, and rectangular prisms
- Instant recalculations based on input
- Interactive animated visualizations
- Customizable units of measurement
- Selectable number of decimal places
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An application for calculating angles, sides, perimeter, area, and volume for triangles, rectangles, circles, spheres, cones, trapezoids, parallelograms, cylinders, and rectangular prisms is a versatile and convenient tool designed to help you perform a wide range of geometric calculations quickly and easily. Whether you are a student, a professional, or a DIY enthusiast, this geometry calculator can be a useful tool for solving everyday tasks. Depending on the selected shape, the calculator allows different types of calculations. For triangles, you can calculate angles, sides, perimeter, and area. For rectangles, side lengths, perimeter, and area are available. For circles, you can calculate radius, diameter, circumference, and area, as well as the volume and surface area of a sphere. For rectangular prisms, you can calculate side lengths, base area, surface area, and volume. The app features a simple and intuitive interface that allows you to easily enter values and quickly obtain results. After entering any parameter, the shape is recalculated instantly based on the latest input. An interactive animated visualization provides a clearer representation of the shape and the changes applied to it. Units of measurement for angles, length, area, and volume, as well as the number of decimal places, can be selected for convenient calculations. The geometry calculator is a practical tool that helps you easily perform a wide range of geometric calculations.
Screenshots
Verdict
The clearest difference is update cadence: Geometry Calculator at every 2 months against Trimm 420's every 18 months. Trimm 420's advantage is iOS requirement (11.0 vs 17). 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, Geometry Calculator every 2 months. The most recent releases landed on May 17, 2026 and September 21, 2026 respectively.
| Parameter | Trimm 420 | Geometry Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (8 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 18 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17 |
| Further details — not scored | ||
| Size | 20 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustav Schubert | Andrey Russkin |
In-app purchases
Trimm 420
No in-app purchases
Geometry Calculator
No in-app purchases








