Welcome to ERPNext. Here’s hoping you have a great experience with ERPNext and here on the community.
Frappe/ERPNext has both an Android and iOS app. ERPNext does Asset, People and Stock Management. So by inference I guess it’s fair to declare that there is an app to manage resources.
Were you looking at a subset of ERPNext? Well that can be done by restricting users to Modules, Documents and even fields within a document.
Not sure if you have explored ERPNext fully, but you should and see whats the extra functionality you’re looking for.