It's quite similar to Blockfolio but since we used BF a lot ourselves, we thought it could be improved. So here is our first try. We'll continue adding features of course. Highlights are probably that you can keep track of ICO's that aren't one exchanges yet. As well as 'Deduct/Add from holdings'. You can download it for free straight away via https://getdelta.io or you can read more about our features via https://medium.com/getdelta/lift-off-delta-cryptocoin-ico-po....
Looking forward to your feedback! We know some stuff is still missing but we're super motivated to add a lot of extra features in the coming weeks and months.