How easy it is to use. How pretty the UI is.

I came across Whimsical around an year back while I was learning to create UML diagrams and sequence diagrams, and I must say I was amazed with what I discovered. Whimsical is loaded with various features which I used to keep at different places randomly prior to this. Like for mind mapping, I used xmind but for flowcharts I used draw.io, lucidchart and even figma, but since I discovered whimsical, I loved how it provides these and various other features right out of the box. I am always on a lookout for centralizing so much of my thoughts, notes, diagrams and whimsical solves for it by giving all these features at one place. Its very easy to use and helps me keep my ideas and notes very visual. What i also love is the way it works in tandem with other tools - like notion where I can integrate it easily, and with chatgpt which has a plugin of whimsical and gives code to directly paste the sequence diagram from chatgpt to whimsical.

Apart from being best free option in its category it has lots of templates to start with.