Here are a couple of videos that you can watch to get a better understanding of how the different applications work.
iWatchr
**This video pertains to an earlier version of iWatchr. A lot of the points in this video still apply but there have been changes made to the app since this video was uploaded. A new up-to-date video will be available shortly**.
***Due to it's length (27min) you won't be able to watch this on an iPhone or iPodTouch. Go Here to watch this video in 3 parts so it can be viewed on an iPhone/iPod***
If watching on a computer.......
To see this video a little bigger and clearer, select the full screen mode button on the video toolbar. The button looks like this....

(If you have already started the video and the toolbar is hidden, just hover your mouse over the video so the toolbar reappears.) Once in full screen mode, in the upper right corner, there is a scaling button. Make sure scaling is turned OFF.