MobiDB Database Designer is a general-purpose relational database app for business users with multi-user access and synchronization. It is able to store any type of information: inventory, invoices, project management, deliveries, orders, locations, etc. The app is designed for Android only. Windows version is to be aquired separately, or you can consider buying a bundle in the other app: https://play.google.com/store/apps/details?id=com.perpetuumsoft.mobidb.lite