SkyVPN is a freemium and ad-supported VPN service provided by Hong Kong based SkyVPN, Inc. They are part of an ever growing list of free VPNs owned and operated by pop up corporations with strong links to China which is a huge privacy and security concern.
The app features numerous outbound connections to third party services which are always a massive privacy concern. Some of the hosts most frequently connected to were:
Some third party connections are inevitable, specifically to services like payment processors or the iOS app store, but the above connections demonstrate a clear attempt to monitor and track the individual using their app.
Speed loss and increased latency are common amongst all VPN services, but severe drop in speed or spike in latency is an indication that the service is being oversold or intentionally throttled. Since with SkyVPN you can only select your country of choice, the proximity of the selected server is random. I was able to connect to New Jersey which is about 1,200 miles away. While the latency was decent, the download speed was throttled to 18Mbps. For contrast, while connected to a ProtonVPN server in New York City, I was able to maintain 274Mbps down with similar latency. So, obviously your mileage will vary, and the speed required will depend heavily on your VPN usage.