Works OK, but running isn't generally done in speed, but pace. Would be better to have it in min or km per mile.
Improved manual mode with bigger buttons and screen always on.
Use your ANT+ footpod or your Garmin watch with Speed Transmitter and your phone will be seen by Zwift as a Bluetooth Smart stride sensor.
Added "miles per hour" speed unit.
Feel free to contact me per mail if you have any feedback. Have fun running indoor on your treadmill while playing Zwift or Arcade Running !