Android based inventory management

Hi there Am looking for an Android (version 5 and above) based inventory management system for use by closed group of people. The essential elements / expected outputs are listed below.. 1. There will be 100's of items as inventory material. We should have provision to add any new material that becomes a part in the future 2. A backend (drive / cloud) Excel or Google sheet should be available to admin(s) to manage inventory on windows platform 3. Designated user should be able to update the daily consumption or addition to inventory from the android phone 4. An automatic report generation and email system about inventory consumption is mandatory 5. Inventory of finished goods (FG) should also be integrated in the same app with multiple location tracking [login to view URL] should be a provision to account customers returns of FG in the same app 7. There should be a provision to add short customer info like name, location, phone number and address when FG is sent outside.. 8. A need-based service for a month after completing the app to edit or modify anything 9. and anything else that's needed for smooth inventory management