is it safe to use vpn on ios? also what vpn should i use + how do i use it properly?

hi, im from the philippines and i’ve been thinking about using a vpn on my iphone mainly for reaching target audience.

i don’t really know much about vpns so i wanted to ask a few things:

is it safe to use vpn on ios long term?

can it cause any issues with apps or phone performance?

which vpn apps are actually reliable for ios?

and how do you usually set one up properly?

just trying to understand it better before downloading anything