This app was removed from the App Store.
Mac OS Utilities
zPerf is a bandwidth performance measurement app for OS X. The app can operate as a client and/or server. zPerf can be used for OS X-to-OS X testing or iOS-to-OS X testing using our WiFiPerf app for iOS. zPerf should work with other operating systems that support iPerf3 but has only been tested with our WiFiPerf app.
zPerf only supports TCP testing at this time. For a more feature rich app please see our WiFiPerf app.