Much, if not all, of what you are looking for can be accomplished in Google Analytics using their Conversion Goals. I am not sure about *all* of it - specifically the information you want the merchants to have access to. There are tools that do analytics better and more detailed for applications...
I would think that they market the you are attempting to target would dictate what the best platform to start would be. Without knowing your market or idea, this is impossible to say. Both mobile and desktop apps have their benefits and traffic/search opportunities, but only if targeted correct...
Yes Wix supports a mulitude of APIs to used for various fetch calls for your web pages. If you already have to API's in mind you can venture off within you WIX code to integrate within your application's processes. There shouldn't be any complications getting this done. Please see the link bel...
Depending on how many simultaneous users you want the application to be able to serve at any given time (peak), and how much processing your application does when uploading and downloading files (as well as other typically used operations), your hosting specification requirements may vary. But,...
I have been in this situation as well as almost every other web application developer and I learned my lesson along the way. You said you and 3 others tested, but I feel that 4 people may not be enough. I think at least 50 to 75 people is a much more sufficient number and here is how I do it wit...
I've been loving Calendly--It links to my Google calendar, which I live and die by!
Asking a broad question welcomes suspect advice. It's unwise to apply generic "data" to a specific application. Narrow the focus - who is the typical user? Under age 30? Over the age of 45? Is the application typically used in the office during work hours or mostly out in the field? Is wifi/cell...