This is the mobile version of VESC Tool, which can be used to configure VESC-based hardware over BLE. It can also be used to stream live data, update the firmware and many other things.

For details, visit
https://vesc-project.com

For VESC Original hardware, see
http://www.trampaboards.com/vesc--c-1434.html

To connect to a VESC over BLE, a compatible BLE module is required. They can be purchased here:
http://www.trampaboards.com/vesc-connect-nrf-wireless-dongle-p-26767.html
you can also build your own:
https://github.com/vedderb/nrf51_vesc