Hmm, Cloak is not there. I really like the people behind it, and they truly care about privacy and security. The iOS app is sorta wonky and turns on and off when it shouldn’t, though.
You should reach out with a bug report: they're pretty responsive.
Note that iOS will disconnect the VPN when the phone goes to sleep, however in iOS9+ you can force all traffic over the VPN (unlike earlier versions).
The best feature of Cloak (to me) is that I have it auto-connect when on any network other than my home network. Airports, cafes, work; Cloak is default on.
