As I wrote, a criteria was: "Web-based (no Apps)". I don't really like mobile apps for this. I think most of them don't offer easy batch imports so you have to enter every trade manually which is even more painful on a mobile device. Also there is not that much space for a good overview.
However I am currently using Blockfolio to keep track of the prices, but not for the performance of my portfolio.
RE: Good free Crypto Portfolio Trackers