I noticed the app section included VPN.

Recently I've been looking for some VPN solution and found that many are quite expensive, though often you get a decent enough discount if you subscribe for like a year or longer. Also, I believe many services are probably not trustworthy (regardless of their claims).

A very affordable alternative is a DigitalOcean droplet with PiHole. You can connect with this VPN with Wireguard, which will probably work just fine on Mavericks. Been using this now for a couple of months and no issues. My costs are probably around 3-4 USD per month, but I don't use VPN all the time.