Bought this item for my husband's bike as he wanted to monitor tire pressure through the app, not as a receiver (of the same brand) on my bike. At Christmas, he put on TMPS caps and installed the app on his phone. Everything went well. After weeks of simply checking air pressure with the app, he noticed erratic pressure readings or no reading at all β the app lost communication with the TMPS caps! So he tried to get the Caps to connect to the app and only one succeeded. Batteries have been changed, nothing so far. I contacted the seller and they said to go to Sykik. I contacted Saiquik and explained the situation. Sikik gave some tips which my husband tried and still nothing! I went back to Saikiku and informed her. Sikik then said they do not recommend TMPS with an app and if I wanted to return an item I could and if I wanted a different TMPS they would exchange it. So I sent the TMPS back to Sykik and exchanged it for the model I have on my bike. No problems with the exchange, very smooth. Got a new TMPS, installed it and it works very well. I cannot recommend TMPS working with the app at all. But I can recommend Sykik support! They worked with me to resolve this situation!