Xcode - iOS - Is there a way to compare contents of two apps?

Question

I know I can use FileMerge to compare app pages. Is there a way to compare entire apps? I have an old version and a new version. There are a lot of changes, and comparing page by page is not proving useful.

Thanks

Answer 1

This is not SourceTree app advertisement. SourceTree just fits good.
Init repository for your first app with git init. From now you can work with it from SourceTree. Open SourceTree, on bookmarks window select "Add repository", switch to tab add working copy and add your working copy, actually). Do your first commit.
Place contents of folder of your second app into your newly-created repository. Overwrite all, if you are asked about. In SourceTree do your second commit. Now you can:
1) See diff
2) Save diff
3) Reverse any of differences
4) Switch between versions etc.