Don't ever user free VPNs and especially something like Hotspot Shield. You can check https://thatoneprivacysite.net/ for a comparison of VPN services.

I use Mullvad VPN which supports both OpenVPN and Wireguard(which is the reason I use Mullvad) and costs 5 euros per month. You can use something like Bitcoin to pay if you want anonymity.

Thanks for opening my cautioning about HotSpot Shield.

5 euros/ month sounds expensive but does it give a bigger bang for your buck?

I think it does. If you want cheaper VPNs, you should checkout Private Internet Access(PIA). If you subscribe for annual plans, you will get it cheaper there. PIA doesn't support Wireguard protocol though.

Thanks for this.

I have already bought Adblock by Futuremind from AppStore. Went through https://thatoneprivacysite.net/ didn’t saw Adblock anywhere. Reckon Futuremind Adblock ain’t that good :(

May I ask on what basis you judge the reliability of VPN’s?

I can already see OpenVPN and WireGuard support, but apart from that, any other major parameter?

Any doc I could read to understand VPN’s better?

Thanks again for taking interest in my issue.

PS - Are you talking about the VPN by Private Internet Access Developer by Anonymous VPN Service and provided by London Trust Media, Inc on AppStore?

The main difference is that VPNs mask your IP address, while Warp does not. If you're using a VPN for online privacy, Warp would not be an adequate replacement.