The most useful feature is that the chat bot answers all the queries on their website, its pretty helpful because whenever i have doubts about something, my mom always ask me whether I had asked them earlier so I never forget to ask them, Its very simple and easy to use. Also, I am a student so my schedule is quite hectic but since I started using this app, I hardly get any late/missed calls or texts from my parents now. The support is excellent and they give you instant responses if you need help. It's free to use and even though it is paid, I don't think it will cost me anything if I ever face any problem or need help. Overall, great app!