Good question. Your submission must fall into one of these categories:
- An “Office Add-in,” which comprises Add-ins for SharePoint or Microsoft Office;
- A SharePoint Framework web part;
- An “Office 365 App,” which is an application that calls the Microsoft Graph or an Office 365 REST API;
- A “Mobile Office App,” which is a native app for mobile devices that calls the Microsoft Graph.
It sounds like yours could fit the first category. If you have more specific questions on your app, you can also email me at email@example.com.