We-Row is a free software for most operating systems, which lets you row online against or with other WaterRower users around the world (WebRace).
You can also race by yourself against a computer-generated pace boat (LocalRace). We-Row is available in english and german language.
This is how it works
On the pc screen you can see yourself rowing in a virtual 2D environment. The S4 monitor has to be connected with your pc. Furthermore the stroke rate, meters per second, or - if connected - the heartrate is also shown on the screen.
The rowing data is stored in a central database and is accessible over We-Row profile settings.