Gravity Forms has been the market leader in custom form generation for WordPress-powered websites for years, and is frequently the “go-to” form plugin for many developers.
However, the wonderful thing about Gravity Forms is that you do not need to be a developer to use it on your site. The UI is simple to use, and their customer assistance is excellent. If you require bespoke forms (contact forms, order forms, etc. ), they are an excellent choice.