BTW, please be aware of how "free" VPNs work and how safe they are.
https://restoreprivacy.com/free-vpns/
As a general rule you should stay away from all "free" providers as... nothing is really free. Psiphon included (they are not really about privacy). Not sure how much I would trust that.
If you really want a "free" VPN, look for providers that offer a free down-scaled version of their "premium" offering. At least you get good privacy with some limitations on functionality, and they offset the cost to their paying customers.
Windscribe and Protonvpn both fall under that category.