Blockchains can be categorized as permissionless (Public) blockchains and permissioned (Open and Closed) blockchains. But not all of them are real blockchains.
Interesting!. I have also developed a simpler and elegant cryptocurrency portfolio tracker app in last September 2017 with same name CoinTracker and available on Apple AppStore and Google Playstore (a version of the same app, which one of my friend did). You might also like to check it out and give a feedback [CoinTracker](https://cointracker.cash) But, the domain is .cash :-)
You may also like https://cointracker.cash It's simpler to use than lots of apps available to track altcoins. Free version is available to test all the functionality and with a one off payment you can unlock the full cryptocurrency set of over 1000+.
Coin Tracker is a simple and elegant app to keep track of your cryptocurrency portfolio. App provides all major cryptocurrency information in real-time including profit / loss of your portfolio to help making your trading decisions on fingertips.