Set DNS lets you force your device to use custom DNS nameservers for the WiFi/cellular network instead of the default from your ISP or mobile service provider. Use it to help speed up browsing, enable content filtering, or bypass DNS-based content filters. You can input custom DNS addresses, or select from some popular free DNS servers like Google DNS, OpenDNS, OpenDNS Family Shield, and FoolDNS. The Pro version ($1.58) lets you set a password to lock down settings and includes home screen widgets to view and change the DNS state.