What widgets are worth adding to the home screen for Android phones?

I feel that there are many useful gadgets on the home screen of my Android phone.

In addition to a series of commonly used applications such as QQ WeChat, there are many gadgets that we need to add to the home screen. For example, I often open memos instead of games. Usually it's easier to forget something, so I usually write it down with a memo, or I don't have a pen in the meeting, or I may use a memo in my mobile phone.

As the most commonly used software of my mobile phone, mobile phone memo is really practical, so it must be put on the home screen.