Funko has an official application (in Beta version) for this among other things. Click here to access it. Also, both Poppriceguide.com or Stashpedia allow you to keep track of your collection, you only have to add figure all you have and you will get a complete list with its value. In addition, Stashpedia has a phone application. There is also an application called Covently that can help you to control your collection from your smartphones.