Software for Vending Machines

Hi all! I own vending machines but use a software compatible with android with an APK that I download into my machines although it isn't very customizable. They have the whole backend system but don't allow me to add product categories to organize the products, they also only allow 1 image per product. I need something that has the entire backend which could be the same but with the customization that I need preferably with more options outside of what I listed to make the product page more appealing, professional and organized. If knowledgeable with this please feel free to pm or comment. Thank you!