I have been using the PayBito app for almost an year. I usually do spot trading from the mobile app as it doesn't require a PC and can be done on the go. I must admit that the app works seamlessly and I haven't faced any lag while using the app. The app is highly optimized as compared to other crypto trading exchanges. There is nothing to dislike as such the only thing which is frustrating is regular updates but its ok as it ensures the safety of my funds. See full review