how to make an icon?

[TimRichards]

I'm planning to make an icon that I feel a need for. Can anyone point me in the right direction on my MBP? Please and thanks! Also interested to know if and how to make it available to use in a general sense, for example, can it be added to the iPhone icon list?

 

[tfindlay]

Typically icons are attached to files or apps. Here is a link to a page that might help in the creation of an icon https://icoconvert.com