You could have downloaded sailtrim upwind one 1.0 for Mac from our software library for free. The actual developer of this free Mac application is Nouveda GmbH. Our antivirus scan shows that this Mac download is malware free. The program 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.