I think the two people who have responded thus far have not provided then answer you need. While market cap and currency conversion sites are valuable, wha the OP is looking for is historical prices of various crypto currencies.

Use this site http://www.cryptocurrencychart.com/ to find the historical prices from the date you bought the currencies. You'll need to know the date you made the purchase and which currency you used to buy the crypto currency.

Finally, you'll need to track this on a spreadsheet (or on your own). I could provide a template. I'm not aware of an app that will allow you to do this but I'm sure you could find one. Coinbase, for example, will show what your coin is worth in your local currency at the time that it was deposited into your wallet but they don't have any reports or summarization features.