I would be very interested in the wallet watcher. I want an app that shows an overview of my Nano S coins but I can't find anything good enough. I tried to use a few apps like Delta or Blox, but the first one doesn't support watching from an xpub/ypub/address (only importing it from an exchange) and the second one only supports BTC/ETH/NEO (from the coins I own).

If you do, please support the coins available on the Nano S and show how much is your portfolio worth (In USD and BTC).