This app was mentioned in 2 comments, with an average of 1.50 upvotes
It looks like there are a few things out there sort of doing what you're talking about:
https://play.google.com/store/apps/details?id=com.scurvypig.barbellLoader&hl=en
Both of these seem to do what you are suggesting as well. The Pendlay loader simply shows the easiest method of loading the bar in a competition setting, and how best to get the weight desired at any increment. If you intend to follow through with this project, then I suppose those two links may be helpful.
https://play.google.com/store/apps/details?id=com.scurvypig.barbellLoader&hl=en
Seems to just crash before i can even figure out what its capable of... but as far as i can tell it just add plates together.
Holy shit awesome graphics. I wounder how they did this. However, this is just showing what plates to use for a single weight.
The confusion here seems to be because i didn't really explain what my app is going to do. I didn't do that because i was asking advice on something else. I should have not mentioned the app at all as makes the post about two topics (always more confusing).
[edit] Thanks again, the second one is really great. maybe i can leverage his grpahics somehow. Though my plan is to integrate this into google docs.