I can see where this can be useful, but how is this different from just writing your set list on a piece of paper, or putting it in a text file and printing it out as needed?
Using your body as a weight is an excellent idea. Does your local park or playground have fitness stations you can use to supplement your workout. These are free.
Whatever name you use, be sure and set up a blog on Blogger or WordPress. Many of your clients may be part of the Internet generation and my want to find out about you on the web.