The best part is the user interface and its ease of use. The app is very user friendly and easy to use. It also offers great features like call recording, screen sharing, and many more.The app is available on both Android and iOS platform. The call quality is great and the call is very clear. The app is very good with the call recording feature. I have not found any thing that I dislike about the app. So far everything is great. I have not faced any issues with the app. I would highly recommend this app to those who are looking for a good VoIP app. I use this app for my VoIP services. I use this app to make calls to various countries. I also use this app to make calls to my clients.