Downloading sailtrim upwind one 1.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is an intellectual property of Nouveda GmbH. We recommend checking the downloaded files with any free antivirus. The software lies within Lifestyle Tools, more precisely Sports.
From the developer:
Sailtrim Upwind one shows you exactly what happens when you adjust each of the sail trim options. It explains what happens when you adjust each of the various trimming functions on your sailboat to make your boat go faster.
You can select the sail you want to trim (mainsail or headsail). Then you can experiment with a choice of different trimming functions, operated by sliders, to either trim or ease the sheet virtually.
You may want to check out more Mac applications, such as SerieFoot, Mini Ramp or AXAnalyst, which might be similar to sailtrim upwind one.