Not recommended
I have a Tacx Vortex and the calibration between the app and the hardware is terrible. I have attempt to calibrate the bike a hundred which ways and always the same issue. I am fine on flats and downs, but as soon as I hit a hill my watts go to approx. 10, and it takes me 5 minutes to go 20 meters. If I stop peddling and restart, the watts go up to about 30 before dropping again. I have not been able to get a solution to this.