# Trimm 420 — 420 rig trim simulation app.

> 420 rig trim simulation app. (iPhone/iPad app by Gustav Schubert.)

- Source: https://appshunter.io/ios/app/trimm-420/id989762941 (this page in markdown: same URL + `.md`)
- Developer: [Gustav Schubert](https://appshunter.io/developer/670940970)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 20 MB
- Languages: American English
- Released: 2015-05-11
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/trimm-420/id989762941/reviews.md

## What is Trimm 420?

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.


## Version history (last 5 releases)

### 1.5 — 2025-07-24

Newly built with current Delphi 12.3

### 1.4 — 2024-01-17

This version has new graphics, and was built with Delphi 12.

### 1.3.0 — 2019-08-23

This updated version is now almost identical to the version for Mac.

### 1.2.0 — 2015-10-22

Update for devices with iOS 9.

### 1.1.1 — 2015-05-19

Auch für iPhone

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## More apps by Gustav Schubert

- [Federgraph](https://appshunter.io/ios/app/federgraph/id670940947)

All apps by Gustav Schubert: https://appshunter.io/developer/670940970

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*