Many people who do DCA, myself included, like to
think that they are reinvesting dividends when most likely they do not.
For example, if you are investing $1,000 each month, and you get $50 in dividends. Unless you consciously add the $50 to the next month's investment, you are not
reinvesting.
This point becomes important when you try to figure out your investment return, ie. total return. If you use a simple tool that asks you to input your monthly DCA amount, if you entered $1,000 then you did not include dividends return. So, you need a fairly complex tool that includes dividends, or you may have to do it the difficult way in Excel provided you know how to calculate (I do not).
Anyway, people have been mentioning about StocksCafe. I just had a look at the
sample report, and it may have what you are looking for. I am also interested, so I may give it a try. The basic plan is free, so we can try that first.