Hi there, niki 1. 

Thank you for stopping by the Community today. While I can't recommend a specific app to you as there are many great ones for you to choose from, I can include a link to our app store. I've also taken the liberty to search for inventory management apps in that link to help you narrow down your search. 

Here are a few helpful links that you can check out:

• Manage your inventory and fulfill orders. 
• Set up and track inventory. 

If there's anything else I can help with, feel free to post here anytime. Thank you and have a lovely Monday.