Fillable form to trigger build

Hey everyone!

Long story short, i am migrating iOS projects from Jenkins to CircleCI and encountered major issue during the migration. In CircleCI UI there is no fillable form to start a build with custom build parameters.
I have solved this issue with Postman because you can pass variables via CircleCI API to specific builds. But Postman does not fit our needs since it does not have “super user friendly UI” as Jenkins has.
Maybe someone knows any integrations with open source tools or had similar experience?

Hi there. Not an official recomendation, but a few of us rave about

Also, this feature request may interest you

If so, if you vote it will express interest and provide updates. Feel free to comment with any clarity into your use case as well.