Cryptohodler is a free iOS app to keep track of all you coins. You get a nice summary of the total worth of your portfolio, as well as info about your individual coins. You can also see market cap data and exchange rates for all coins.
Everything is stored encrypted locally on your device, so you don't need to create and account of any sort and none of your information is sent or stored to any server. The only exception is that you can opt in to backup your data to iCloud.
The app is free to try and use with two coins. If you like it and want to track more coins you can unlock it for a one time in app purchase and track as many coins you'd like.
Cryptohodler is also accessible and works great with Voice Over.
https://itunes.apple.com/us/app/cryptohodler/id1276165344?mt=8