I have PIA and SkyVPN on my phone. I work at a school and there’s zero cell signal in the building. The free SkyVPN app connects to the school WiFi without issue (although occasionally the free tier is “busy”). I pay for PIA, and it can never connect. I’ve tried every protocol and every combination of handshakes and encryption and everything. It never connects.
he’s on mobile / iOS which doesn’t support proxy modes
EDIT: *PIA doesn’t offer proxy support natively through their app. You could import a PIA config into the VPN area of the iOS settings and then configure a proxy etc.
A free VPN without any knowledge of it and comparing to a paid service is completely different.
If you are not the customer, you are the product. The free service has to make money and they will off of you by selling your data.
They are based in China, there have been multiple incidents of leaks for web traffic, dns traffic, ip leak, etc. Im doing 10 minutes of searching and they have invasive logging policies, poor user experience, etc.
Sky is probably just rotating ports to find one that can connect out automatically since there is no config option.
If you don’t care about privacy, where your data ends up, who is seeing it etc and all you want is to view blocked / restricted content at school like streaming services, then Sky might be your solution.
If you want to use PIA, you can customize a config online, import it into the iOS settings and even use proxies like shadowsocks. This can’t be done in the PIA app as there are limitations.