I am rating it 2 star because what I found today about the app is really very disgusting. I am using mi note 4 which is quite an old phone. Every time I open WhatsApp, the screen gets Frozen and I have no option other than to close the app. I tried clearing the app data but it didn't work. I even tried to reinstall it but again it has the same problem. Now what I actually have deduced about it is that the older versions are no longer maintained by the company and has certain bugs.