How to give a good name to a small program?

The name of the APPlet is the same as the name of the app. First of all, the name should highlight the characteristics and functions of your product, so that users can think of what you do at first sight, such as keeping secret WeChat applet. I think everyone will know what it is at a glance. Yes, chatting, and it is a very private chat, so you have to understand this.