Also stay in the loop with what's going on through these awesome links:
In general there needs to be more on off options for user roles. But specifically, giving someone access to run the invoice app shouldn't be to make them a supervisor.
Thank you for your feedback. I want to make sure I fully understand your request. Currently, you have to be a supervisor or administrator user in order to install the invoice app from the app store. However, once the invoice app is installed a clerk is able to access the invoice and recurring functionality when they log in from the left-hand menu. Do you mind further explaining what you are looking to have clerks access that is not currently available to them?
You won't be notified about changes to this idea.