About the price changing in version 2.1.0
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If you bought Surge before version 2.1.0, it includes a free license for Surge Mac. Please redeem it in the 'More' tab. From version 2.1.0, Surge Mac license is not included.

Surge is a web developer tool and proxy utility for iOS 9. This app is designed for developers and may require some level of professional knowledge to use.

Features
* Capture all HTTP/HTTPS/TCP traffic from any applications on your device, and redirect to an HTTP/HTTPS/SOCKS5/SOCKS5 TLS proxy server following highly configurable rules;
* Record and display HTTP request and response sent from your iOS devices, including body and header;
* Configure rules using domain match, domain suffix, domain keyword, CIDR IP range, and/or GeoIP lookup;
* Measure traffic usage and network speed on WiFi, cellular, and proxy connections.
* Import rules from URL or iTunes File Sharing;
* High performance and suitable for intensive use;
* Block ads by domain rules;
* Local DNS Map (equivalent to /etc/hosts). You can use this function to switch production/development environment for your app without changing any code.
* Work on cellular network.

Known Issues
* The HTTP/HTTPS proxy server must support CONNECT method, even when accessing plain HTTP resources.
* HTTP pipelining is not supported.