Guardian Firewall, a brand new VPN that claims to be the best iOS firewall on the market. It's proved useful so far ~~but who would ship a product that has a broken subscription sign-up panel? Hope they get that fixed asap~~.

Update: The subscription issue has been fixed but two problems are now quite pressing. Firstly, the settings tab is empty which is not good at all. Secondly, Guardian is setting my host server to somewhere in the US so this is playing havoc with streaming services that I use - Amazon Prime, Netflix, Apple TV etc.